Time Travel Narratives Recommended Reading List

To wrap up my little mini series of blog posts about time travel narratives, I am ending with a fairly large recommended reading and viewing list. There’s a bunch of stuff on here, some nonfiction books about the science and theories of time travel, an enormous list of novels, a couple anthologies, and bunch of movies, and a handful of relevant tv shows (mostly from Star Trek, which is famous for their time travel episodes).

This list is not remotely exhaustive. There are hundreds and hundreds of possible books and other media to include in this list. But this is a pretty place to start. It’s a fairly representative list of the most well-known and popular media on the subject. I have not read all of these books, or watched all of these movies (though I have at least some familiarity with a large majority of them).

I have them separated into categories, but they are not in any kind of order whatsoever (not chronological, alphabetical, or quality). Sorry, I was too lazy to work that much out. In any case, have fun with this list!

Non-Fiction Books:

  • Time Travel: The Popular Philosophy of Narrative by David Wittenberg
  • How To Build A Time Machine: The Science Between Time Travel by Brian Clegg
  • Black Holes and Time Warps: Einstein’s Outrageous Legacy by Kip S. Thorne
  • The Science of Interstellar by Kip S. Thorne
  • Time Traveler: A Scientist’s Personal Mission to Make Time Travel a Reality by Dr. Ronald Mallett and Bruce Henderson
  • The Order of Time by Carlo Rovelli
  • Time Travel in Einstein’s Universe: The Physical Possibilities of Travel Through Time by J. Richard Gott

Anthologies:

  • The Time Traveler’s Almanac, edited by Ann and Jeff Vandermeer
  • The Best Time Travel Stories of the 20th Century, edited by Harry Turtledove and Martin H. Greenburg

Novels:

  • The Time Machine by H.G. Wells
  • Time and Again by Jack Finney
  • From Time to Time by Jack Finney
  • End of Eternity by Isaac Asimov
  • Slaughterhouse-Five by Kurt Vonnegut, Jr.
  • Time Enough for Love by Robert A. Heinlein
  • A Connecticut Yankee in King Arthur’s Court by Mark Twain
  • The House on the Strand by Daphne DuMaurier
  • The Man Who Folded Himself by David Gerrold
  • A Wrinkle in Time by Madeleine L’Engle
  • Kindred by Octavia Butler
  • Hyperion by Dan Simmons
  • The Time Traveler’s Wife by Audrey Niffenegger
  • The First Fifteen Lives of Harry August by Claire North
  • Outlander by Diana Gabaldon (Book 1 of the Outlander series)
  • Timeline by Michael Crichton
  • Woman on the Edge of Time by Marge Piercy
  • The Accidental Time Machine by Joe Haldeman
  • The Shining Girls by Lauren Beukes
  • 11/22/63 by Stephen King
  • Doomsday Book by Connie Willis
  • To Say Nothing of the Dog by Connie Willis
  • Black Out/All Clear by Connie Willis
  • How to Live Safely in a Science Fictional Universe by Charles Yu
  • This Is How You Lose the Time War by Amal El-Mohtar and Max Gladstone
  • All You Need Is Kill by Hiroshi Sakurazaka 
  • Recursion by Black Crouch
  • Just One Damn Thing After Another by Jodi Taylor (Book 1 of Chronicles of St. Mary’s series)

Movies:

screenshot from The Time Machine (1960)
  • The Time Machine (1960)
  • Terminator
  • Terminator 2
  • Looper
  • Primer
  • Back to the Future
  • Time After Time
  • Planet of the Apes
  • Donnie Darko
  • Groundhog Day
  • Interstellar
  • Safety Not Guaranteed
  • Arrival
  • La Jetee
  • 12 Monkeys
  • The Girl Who Leapt Through Time
  • Your Name
  • Edge of Tomorrow
  • The Philadelphia Experiment
  • Somewhere in Time
  • Time Bandits

TV Episodes:

(These shows all did multiple time travel-centric episodes. I have not listed all of them, just a representative handful.)

screenshot from “The Late Philip J Fry,” Futurama

Futurama — “All’s Well That Roswell,” “The Late Philip J. Fry,” “The Why of Fry,” “Meanwhile”

Star Trek: TOS — “City on the Edge of Forever,” “All Our Yesterdays,” “Tomorrow is Yesterday”

Star Trek: TNG — “Time Squared,” “Yesterday’s Enterprise,” “Time’s Arrow,” “Tapestry,” “All Good Things”

Star Trek: DS9 — “Past Tense,” “Visionary,” “Wrongs Darker than Death or Night,” “Time’s Orphan”

Star Trek: VOY — “Future’s End,” “Before and After,” “Year of Hell,” “Relativity”

*I didn’t really watch Enterprise or Discovery, though I know they also feature plenty of time travel. Also, season 2 of Picard is centered around one giant time travel plot. 

Pretty much all of Doctor Who (obviously,) but I especially recommend “Blink”

Also, all of Quantum Leap, which is a CLASSIC.

Twilight Zone had several of time travel eps, but the one that comes to mind most is “Cradle of Darkness”

Time Travel Narratives: The Time Traveler’s Almanac

Apologies for the delay! Life is life-ing at me pretty hard right now. But here is the next installment in my mini series on time travel narratives. This week I’m talking about a great short story collection. Next week I’ll share a big Recommended Reading/Viewing List to wrap things up.

The Time Traveler’s Almanac is a short story anthology, published in 2013, edited by Ann and Jeff Vandermeer, that collects 65 short fiction pieces as well as 5 nonfiction essays on the subject of time travel.

This collection contains (among much else): an excerpt from HG Wells’s novel, The Time Machine, Ray Bradbury’s famous short story “A Sound of Thunder,” and Connie Willis’s novelette “Fire Watch” – which introduced the time traveling history department of Oxford University which later became the central focus of her novels Doomsday Book, To Say Nothing of the Dog, and Blackout/All Clear. Many well-known and critically acclaimed short stories are featured in this anthology, as well as  a large number of lesser-known works that are unique and entertaining takes on the genre. One of the strengths of this collection is the breadth and diversity of its selections. The short fiction covers a range of authors, time periods, and subject matter including but not limited to: sexuality, ethnicity, immigration and refugee status, love overcoming adversity, and all the usual science fiction trappings of fate, inevitability, and the mind-bending possibilities of time loops and paradoxes.

A couple of my favorites from this anthology include “The Clock That Went Backwards” by Edward Page Mitchell, “The Gernsback Continuum” by William Gibson.

“The Clock That Went Backwards” (which I mentioned briefly in a previous post) is one of the earliest time travel narratives that features a mechanical/scientific means of time travel (rather than a magical/spiritual one). This short story, published in 1881, predates H.G. Well’s The Time Machine by more than 10 years, and was a major stepping stone in the development of time travel narratives as a genre. In this story, the narrator recounts his childhood with his aunt who owned a very old Dutch clock. When the aunt dies, the narrator takes possession of the clock. While in university, one of his professors takes an interest in the clock, and argues that based on Hegel’s concept of Aufhebung, he believes that the sequence of past, present, and future is arbitrary and can be changed. To demonstrate, he winds the Dutch clock backwards, during which it is struck by lightning and causes a fire. In the aftermath the professor and the narrator find themselves thrown out of their time and into the 1500s. After a series of disasters, the narrator is knocked unconscious and awakens back in his own time again. It is never clear how the clock sent them to the past, nor how they returned.

“The Gernsback Continuum” is a short story by William Gibson published in 1981. Gibson, incidentally, is one of my favorite authors and his first novel Neuromancer, is one of the most important cyberpunk novels (arguably the first) ever written. The name “Gernsback” in the title pays homage to Hugo Gernsback, a publisher who pioneered the creation of science fiction pulp magazines. In this short story, a photographer is assigned to photograph the futuristic architecture of the 1930s, a period in time that attempted to imagine what the far utopian future might look like. While doing so, the photographer finds himself slipping in and out of a version of the present/future 1980s, based not on current reality but on the optimism of that 1930s vision. A version of reality filled with utopian visions of flying cars and zeppelins and glittering “raygun gothic” architecture. Eventually, he breaks free from this slippage of reality back to the real 1980s, which he finds horrific, violent, and full of despair.

A couple other stories in the collection I’d recommend are: “If Ever I Should Leave You” by Pamela Sargent, “Himself in Anachron” by Cordwainer Smith, and “Palimpsest” by Charlie Stross. But seriously, the entire collection is worth a deep dive.

This collection of stories is very well curated and organized by the editors, with a wide range of texts, that offers a strong overview of the time travel narrative genre. It is a good place for any reader or scholar to start as they enter into an in-depth examination of the genre. I highly recommend it to anyone looking to branch out, learn more about the history of the genre, or gain a more expansive view of SFF in general.

Time Travel Narratives: End of Eternity by Isaac Asimov

Continuing with my little mini series of blog posts about time travel narratives, this week I decided to talk about one of Asimov’s lesser-known works. (I had briefly considered writing about Slaughterhouse-Five by Kurt Vonnegut first, but as with The Time Machine, I decided that that novel was well-known enough that it probably didn’t need my endorsement or opinion). Isaac Asimov is, of course, very famous and many of his books are so well-loved they’ve been made into movies and television (I, Robot and Foundation, as just two examples). But this standalone time travel novel is one of his works that has not had quite the longevity of readership that so many of his others have had.

But first, I have to talk about Asimov himself for a second, because good lord this man’s legacy is mind blowing, and his life was truly fascinating.

Isaac Asimov by Rowena Morrill (via Wikipedia)

Isaac Asimov was born sometime between October 1919 and January 1920 in Petrovichi, Soviet Russia. Due to the uncertainties of the time and the severe lack of records, no one (not even his own family) knows precisely when he was born, but Asimov himself decided to celebrate his birthday as January 2, 1920. He came from a family of Jewish millers, who all immigrated to the US when he was 3 years old, where they lived in Brooklyn and owned a candy store.

He started college at the age of 15, and published his first short story, “Marooned Off Vesta” at 19. He attended Columbia University for graduate school and earned a bachelor’s and master’s in Chemistry, and a PhD in biochemistry in 1948. Between his degrees he briefly served with the US Army during WW2 and narrowly avoided participating in the atomic bomb tests at the Bikini Atoll in 1946. After earning his PhD, he went on to teach at the Boston University of Medicine where he remained in some capacity until his death. And he wrote nearly non-stop.

A few fun facts about Asimov: he was afraid of flying and flew only twice in his life; he also never learned to swim or ride a bicycle. He had a wide array of interests from opera to Sherlock Holmes, and he was one of the founding members of the Committee for the Scientific Investigations of Claims of the Paranormal (now known as the Committee for Skeptical Inquiry). He was friends with Kurt Vonnegut and Star Trek creator Gene Roddenbury.

He died in 1992 from heart and kidney failure at the age of (approximately) 90 years old.

While Asimov is most famous for his science fiction novels, he actually wrote in many other genres including mystery, fantasy, children’s, and nonfiction. He was one of the most prolific writers of any time or genre, ever. In fact, his career includes over 500 books on various subjects, many many short stories, and approximately 90,000 letters, and his books have been categorized in 9 out of the 10 major categories of the Dewey Decimal system.

His science fiction career could be split into essentially two periods of time and focus: the first started with his first publications in 1939 and ended in 1958 with the publication of his novel The Naked Sun. From about 1952 onward, his attention became focused on his nonfiction writing, during which time he co-authored a textbook called Biochemistry and Human Metabolism, and wrote an enormous collection of books on topics ranging from physics to the historical contexts of the Bible. Then, in 1982, he picked up his science fiction career again, and wrote a number of continuations and sequels to previous works, starting with Foundation’s Edge.

His most well known works are his Foundation series, Robot series, and Galactic Empire series. Later in life, he wrote a number of books that connect each of these series to each other, thus creating one unified (if somewhat inconsistent) Story Universe. In 1964, the Science Fiction Writers of America voted for his short story, “Nightfall,” published in 1941, as the best science fiction story of all time. He is credited with coining the words: positronic, psychohistory, and robotics. And possibly his most enduring contribution is the “three laws of robotics,” which are still used today.

He was awarded honorary doctorate degrees, won 7 Hugo Awards, 2 Nebulas, and many other awards besides. An asteroid, a crater on Mars, a Brooklyn elementary school, and a literary award have all been named in his honor. Few writers in any genre have received the kind of respect, accolades, and adoration that Isaac Asimov did both during his lifetime and after his death.

All of that said, (and sorry that bio got a bit long, but the man was truly FASCINATING), I want to talk about End of Eternity, written in 1955. This is a standalone novel that does not connect to any of his larger series canons. It offers a particularly fascinating take on time travel, elements of which may have influenced contemporary works like the Time Variance Authority in the Loki tv series, and the two competing time factions in the novella This Is How You Lose the Time War.

End of Eternity is a complex novel, with elements of mystery, that centers around a time travel organization called Eternity (its members called Eternals), which was created in the 27th century and aims to improve human happiness and protect humans from harm or danger. To do so, they observe human history, analyze their options, and then make small “reality changes” that mean to reduce suffering at the (in their minds, justifiable) cost of losses in technology, art, and other cultural endeavors that they judge to have a harmful effect in the long run. Safety is prioritized over creativity, discovery, or excitement.

Members, the Eternals, are recruited throughout time from their “homewhens” and trade is even established between various time periods in order to help the times that need it the most. The Eternals can travel “upwhen” and “down when” in time — imagined as almost physical structures like elevators or corridors — and can enter various time periods in devices called “kettles.” 

However, no one can travel to times before the 27th century, when the temporal field that powers Eternity was created. This limit is called the “downwhen terminus.” Furthermore, they cannot access the time periods between years 7 million to 15 million for reasons they do not know. These are called the “Hidden Centuries.” Again, these are described as physical structures, as if Eternity has built corridors up into the Hidden Centuries but cannot open any of the doors to actually ACCESS those centuries.

The main character, Andrew Harlan, is a respected and excellent Technician — a specialist in reality changes and an expert in the “Primitive times.” Senior Computer Laban Twissell [please note that “computer” here is used in its original meaning as a person who computes, as this was written before the creation of computers as we know them now], the Dean of the Allwhen Council, assigns Harlan to teach a newcomer, Brinsley Cooper, about the Primitive times to prepare him for an assignment.

At the same time, Harlan’s direct boss (with whom he has an antagonistic relationship), Assistant Computer Finge, orders him to spend time in the 482nd Century. There, Harlan stays with a woman named Noys Lambent, a non-Eternal member of that time period’s aristocracy, and falls in love with her. When Harlan learns that a coming reality change will affect that century and likely change or erase Noys, he breaks Eternal law, removes her from her time period, and hides her in the empty sections of Eternity that exist in the Hidden Centuries.

From this point on, Harlan is confronted with one mystery after another, as his bosses and colleagues all seem to be working against him, and even the woman he loves might have dangerous secrets. Everything he thought he knew about time is put into question. And the choices he must make may change everything.

It is very very difficult to talk about this book without revealing all kinds of spoilers. Which I generally prefer not to do. I really advocate for being able to experience the plot twists and the big reveals and the endings first hand without having any forewarning. That means that I can give you only the barest hints at why this book is so fascinating. The first third of the novel can be a little slow moving, but once the twists start popping up (and there are several big plot twists) the momentum does not let up.

This novel explores some really fascinating questions about fate and inevitability (within the context of a closed time loop), the power of love to defy societal expectation and law, and what the point of humanity even is — safety or creativity? Stability or discovery? Some characters come to one conclusion. Harlan comes to another. And the conflict between the two gives the ending tension and ambiguity.

If you are not familiar with Asimov’s writing style, it’s important to be aware that his style is, in a word, unadorned. In a lot of ways he is the exact opposite of Jack FInney, the writer I discussed last week. Where Finney’s writing is complex and highly descriptive, Asimov’s is clean and spare and utilitarian. This is not at all a bad thing, just a very different style that will appeal to some people and turn off others. If you’ve read any other work by Asimov, you’re already aware of this, and you’ll know what to expect. Asimov is basically an ideas writer, not a prose writer. And the ideas are compelling.

I will also add that throughout his entire career, Asimov had a bit of a woman problem. There are few women in his novels, and when they are there, they are often… problematic. This is true in End of Eternity as in any of his other works. I think there is enough value in everything else the novel has to offer (as with all of his work), to make it worth to deal with a less-than-stellar woman character, but it’s something readers should be aware of.

Time Travel Narratives: Time and Again by Jack Finney

I thought briefly that I might write a post about The Time Machine by H.G. Wells, but then I decided that the book (and the many movie versions) are so well-known, and have been discussed by so many smart people, that it would feel a bit redundant for me to do so now. So, I thought I instead that I might talk about a book or two that, while very well-regarded in their time, have not remained as instantly-recognizable with current readers as they should be. And I’m starting with this one: Time and Again by Jack Finney.

I recently had the opportunity to re-read this classic of time travel fiction, which I had read a couple decades ago but didn’t remember much about. I wanted to share a bit about this truly excellent novel, and hopefully encourage more people to read it now.

Time and Again (1970), an illustrated science fiction time travel novel by American author Jack Finney, follows Simon “Si” Morley as he is recruited to a secret government time travel project, and succeeds in traveling to 1882. There, Si tries to unravel a possible conspiracy, falls in love, and faces difficult choices between love and obligation, loyalty and ethical duty. This is the first of two novels, with the sequel From Time to Time (1995) published the year Jack Finney died. Finney left the ending open for a third novel that was never written.

Many of Jack Finney’s short stories and novels had commercial and critical success. His first novel, 5 Against the House, was published in 1954 and made into a movie in 1955. He is most famous for his second novel, The Body Snatchers (1955), which became his most commercially successful venture, spawning the 1956 movie Invasion of the Body Snatchers and its many remakes. Five of Finney’s novels and several short stories were adapted for film and television in his lifetime. However, his greatest critical success came with Time and Again, which remains his most highly-regarded work by fans and critics alike.

In the introduction to the 50th Anniversary edition of Time and Again, science fiction author Blake Crouch credits Jack Finney and this novel with starting him on the path to becoming a best-selling science fiction writer. And Stephen King, in the Afterword for his novel 11/22/63, claims it is “in this writer’s humble opinion, the great time-travel story.”

In Time and Again, the main character, Si Morley, works as an illustrator for an advertising agency in 1970s New York City, where he is dissatisfied with his life, and bored at work, with no family and a few lackluster romantic relationships. One day he receives a visitor at work, a man named “Rube” Prien–a Major in the Army, who has come to recruit Si to a top-secret government project: an experiment in time travel devised by Dr. E. E. Danziger.

Danziger, a physicist, believes he has devised a method of time travel: by tricking the brain into believing a person is already in a physical location in the past, one can become detached from their own time, and travel back in time.

Si is skeptical at first, but ultimately agrees to join the experiment if he is permitted to travel to New York in January 1882, to witness the mailing of a letter and unravel a mystery that has been haunting him and his girlfriend, Kate. Kate’s father gave her a letter once mailed to HIS father, Andrew Carmody in January 1882 – a letter that hints at a fire that may destroy the world, and was somehow connected to Carmody’s suicide years later. Si intends to learn who sent that letter and what it really means.

And so Si’s adventures in time travel begin. He travels back and forth between 1882 and the 1970s several times, uncovering a larger mystery than he could have guessed, and accidentally falling in love in the process. In his efforts to solve the mystery of the letter, he will come face to face with complex ethical questions about the limits of scientific discovery, the moral obligations of those in power, the dangers of messing with the timeline, the inevitability of fate, and what it means to find the place where you belong.

This book is widely considered a masterpiece of the time travel narrative genre. It features rich detailed descriptions of New York City in the 1880s that beautifully make the time period and setting come alive. This is aided by Finney’s meticulous use of real drawings and photographs from the time period (which he attributes to his fictitious characters), and even quotes and clippings from newspapers of the time. The characters are complex, with deep emotional resonance, genuine motivations, and rich histories. Finney treats even many of the briefly-mentioned side characters with careful attention and detail.

In addition, the narrative voice of Si Morley (the story being written in first person POV) as Morley relaying his experiences, is intelligent, wry, and humorous. Si’s sarcastic wit is often on display, both in his descriptions and in his dialogue with other characters. And his observations about humanity are thought-provoking and insightful.

Over fifty years later, Time and Again is still as impressive as it was upon its initial release. Despite a few outdated statements, it continues to be philosophically rigorous, utterly fascinating, beautifully written, and highly entertaining. I strongly believe it will remain a high benchmark for the genre for decades to come.

A Brief History of Time Travel

For a recent freelance project, I found myself revisiting some time travel narratives. Years ago I taught an entire course on time travel narratives, and it was fun to have an opportunity to dig up those old lecture notes, and re-read a couple of the novels and short stories I taught in that course. I had mentioned at the beginning of the year that I might like to re-purpose some of that work for the blog, since its become abundantly clear I’m not likely to go back into teaching any time soon and all that work might as well be put to some kind of use.

SO! I’ll be doing a handful of blog posts in a sequence about time travel. I promise not to go on about too long, but I thought it might be fun. I’ll start with a brief overview (here), and then discuss perhaps just a couple of novels and a short story or two, and end with a full reading list (and viewing list as well — since there’s some great time travel stuff in film and television). I hope that sounds like fun! It’s fun for me at least.

So without further ado: A Brief History of Time Travel

Time travel exists as a philosophical concept, a scientific principle, and narrative subgenre. The possibilities and implications of time travel have been explored for centuries and appear in many different cultures. While time travel as imagined in fiction may not be possible, some scientists argue that one-way time travel might be possible through the concept of time dilation in the special theory of relativity.

Time travel, as a narrative subgenre, exists in both fantasy and science fiction, but its earliest appearances are in myth and folklore. Two of the oldest examples are “The Tale of Kakudmi” in Hindu mythology. and “The Tale of Urashima Taro” in Japanese folklore.

“The Tale of Kakudmi” appears in several Hindu texts, most prominently the Vishnu Purana (Book IV, Ch 1) — one of 18 important ancient Hindu texts that contain stories of the Hindu gods, kings, and dynasties. When the Vishnu Purana was written is highly contested, but some estimates suppose it to be as old as 1000 BCE. “The Tale of Kakudmi,” briefly, is this:

Kakudmi was a king with a daughter named Revati. Revati was so beautiful that Kakudmi believed no one upon the Earth was worthy enough to marry her. So they went to the Hindu god Brahma to ask for advice, giving him a list of possible suitors and asking which is most worthy. However, Brahma informs them that time moves differently for the gods, and by teh time Kakudmi and Revati return from their visit with Brahma, everyone they have ever known will be long dead. In the short time Kakudmi and Revati are with Brahma, 27 catur-yugas have passed among men (1 catur-yuga = approx. 4,320,000 years according to the Vishnu Purana; so 27 catur-yugas = approx. 116,640,000 years). When Kakudmi and Revati return, they find that no only have the landscape and environment changed drastically, but that the civilizations of men have declined, becoming less than they were in Kakudmi’s own time. Kakudmi states that “he found the race of men dwindled in stature, reduced in vigour, and enfeebled in intellect,” thus making them even less worthy of his daughter than they had been in his own time.

“The Tale of Urashima Taro” is from Japanese folklore, first seen in the Nihongi, the second oldest book of classical Japanese history, and perhaps written around the 6th century. Like “The Tale of Kakudmi,” Urashima Taro is the story of a man who goes to a supernatural location, where time moves differently, so that he experiences only a handful of days while 300 years pass for normal men.

Both of these stories could be considered very early examples of the concept of time dilation, in which time moves more quickly or slowly depending on where you are, based on the theory of relativity that states all perceptions of time differ for different people in different places.

The earliest time travel in stories happened though magical or mystical means: a god, a spell, a mysterious realm. For instance, in the play Anno 7603 by Norwegian poet Johann Hermann Wessel, written in 1781, two men are sent far into the future by a good fairy, where they find that gender roles have reversed and only women are allowed to fight in the military. Then there is, of course, the case of the short story “Rip Van Winkle” by Washington Irving, published in 1918, in which a man mysteriously falls asleep and wakes up decades later without explanation.

The oldest known story of time travel by means of a machine is Edward Page Mitchell’s “The Clock That Went Backward,” written in 1881, though even this story is more magical than science-fictional. It was H. G. Wells’s famous novella The Time Machine (1895) that truly popularized the idea of time travel through scientific and mechanical means; however his short story, “The Chronic Argonauts,” includes a time machine as well, and predates the Time Machine by seven years.

The method used in the highly-regarded novel Time and Again (which will be discussed in my next post) travel is loosely inspired by Einstein’s theories of time, based on the Special Theory of Relativity, combined with the concept of “self-hypnosis.” This method was also popularized in the novel Bid Time Return by Richard Matheson (most famous for I Am Legend and What Dreams May Come), which inspired the film Somewhere in Time starring Christopher Reeve.

Since then, time travel has remained a popular trope in both fantasy and science fiction stories in both print and visual media. Many science fiction stories take great pains to offer detailed explanations for how and why time travel works. But in just as many stories, the how and why of time travel is ignored in favor of the social, historical, or personal consequences of that travel. In some cases, the time travel is merely a trope used to propel another kind of story, such as in the Outlander series (books and tv show), where the time travel elements are mostly used to allow for the romantic drama.

Literature scholar David Wittenberg argues that time travel fiction is a kind of “narratological laboratory” in which the “most basic theoretical questions about storytelling,” as well as philosophical concepts of “temporality, history, and subjectivity, are represented in the form of literal devices and plots,” for the purpose of exploration, through experiments, analysis, and criticism (Wittenberg, David. Time Travel: The Popular Philosophy of Narrative. Fordham UP, 2013).

Some of the most popular themes within time travel narratives include: fears or hopes of changing the past, alternate pasts and alternate futures, observing or communicating with another time, time loops and time paradoxes, time wars, and the prevalence of human emotions such as love overcoming the obstacles of time.