People say it all the time: they’d love to get into science fiction or fantasy, but they’ve no idea where to start. If this is you (or if you’re one of those stubborn folks who looks snootily down on genre), listen up. Your trusty Flavorwire editors have a few suggestions for you — that is, a whole 50 sci-fi and fantasy novels that are well worth your time, whether you’re brand new to the concept of dragons and/or spaceships or a seasoned veteran. A few notes on the construction of the list: no short stories or short story collections, no matter how brilliant (looking at you, Kelly Link), were included. Also, in the interest of fairness, only one work or series by any given author was included. Finally, because this is a list of novels that adults should read, it skews light on the YA, including only those books that grown-ups should pick up if they missed them in their teens. Even with all of the above, you’ll probably have quibbles. After all, 50 novels over two genres doesn’t even begin to cover it. So air them (politely, please) in the comments and you’ll add to all of our reading lists.

Ubik , Philip K. Dick

Any number of Dick’s works could have made this list, and choosing just one wasn’t the easiest task, but the brilliant, existential Ubik, with all its conflicting, unresolved “realities,” just might be the best of the bunch.

Ender’s Game , Orson Scott Card

Politics aside, there’s no getting around the brilliance of this book, which is not only a thoroughly engrossing page-turner, but also manages to be about war, politics, empathy, video games, manipulation, identity, and how much your big brother can truly mess with you. Plus, there are more where that came from.

The Lord of the Rings trilogy, J.R.R. Tolkien

Well, obviously. Depending on whom you ask, The Lord of the Rings is basically both the Moby-Dick and the Great Gatsby of fantasy literature.

The Handmaid’s Tale , Margaret Atwood

Though Atwood would describe this terrifying dystopian novel, as well as her Oryx and Crake series, as “speculative fiction,” it just didn’t seem right not to include it here. After all, not only is it an influential and widely popular work, but it won the very first Arthur C. Clarke award, given to the best sci-fi novel in any given year. Can’t argue with that.

Dhalgren , Samuel R. Delany

Delany’s classic novel is a gorgeously convoluted, circular puzzle, full of Greek mythology, texts-within-texts, and incredible language. It’s also a fairly controversial addition to the canon — Theodore Sturgeon called it “the very best ever to come out of the science fiction field.” Then again, Harlan Ellison threw it against a wall. Better read it and decide for yourself.

A Song of Ice and Fire , George R.R. Martin

No, it’s not good enough to just watch the show – like (almost) always, the books are better. And don’t you want to be the smarty-pants explaining how things really happened at your GoT watching parties? You know you do.

Frankenstein , Mary Shelley

Not only is this novel brilliant, beautiful, and endlessly upsetting, it’s also widely acknowledged to be one of the first – if not the actual first – science fiction stories ever written.

The Gormenghast series, Mervyn Peake

This series, often cited as the first fantasy of manners, is also a surreal harkening to Regency romance, with a healthy serving of Gothic literature. Plus, you get to hang out with a protagonist called Titus Groan.

The Moon Is a Harsh Mistress , Robert A. Heinlein

Heinlein has several books that could have made it onto this list, but The Moon Is a Harsh Mistress, which details a lunar colony’s revolt against Earth, a self-aware computer named Mike, and the important concept of TANSTAAFL, is this writer’s favorite.

Kindred , Octavia Butler

In this novel, a 26-year-old black woman is suddenly (and then repeatedly) transported back in time to a slave plantation in the antebellum South, where she is subjected to all the harshest parts of slavery as she protects the son of a slave owner. But of course, like several other authors on the list, this novel only represents the tip of the iceberg of Butler’s brilliance. In 1995, she received the MacArthur Foundation Genius Grant, becoming the first science fiction writer ever to snag the honor.

The Left Hand of Darkness , Ursula K. Le Guin

It was hard not to put A Wizard of Earthsea here (and consider it installed in spirit), but actually, it’s difficult to go wrong with Le Guin. This novel explores an alien planet populated by a race of unisex beings who are able to assume either binary gender during reproduction, and is chock full of philosophical insights on humanity and society – both current and future

Nine Princes in Amber , Roger Zelazny

This one is a classic that is too often overlooked by the general public. After all, as Lev Grossman explained it, “You can’t top the setup: it begins like Harry Potter crossed with The Bourne Identity, and it only accelerates from there. Our hero wakes up in a hospital with no memory of who he is. He gradually discovers that he’s part of a noble family, a (literal) Tarot deck of superpowered princes and princesses of Amber, a world of which our own is merely a shadow.”

Jonathan Strange & Mr. Norrell , Susanna Clarke

Clarke is another writer who straddles genre – sometimes many at once. Her debut novel blends winking fantasy and adventure and what she calls “pastiche historical” with excellent magic and explores the tension between reason and madness as much as it does the tension between good and evil.

Slaughterhouse-Five , Kurt Vonnegut

This is a classic American novel that everyone always forgets is also a classic American sci-fi novel. But what else can you call a book whose narrator has become “unstuck in time?” Or, say, who has been abducted by aliens from planet Tralfamadore? Yeah, that counts.

The City & The City , China Miéville

Miéville is the cool kid of contemporary fantasy/weird fiction/steampunk/what have you, and he also happens to be a stellar author. This highly decorated book (it won the Locus Award for Best Fantasy Novel, Arthur C. Clarke Award, World Fantasy Award, BSFA Award, and tied with Paolo Bacigalupi’s The Windup Girl for the Hugo Award for Best Novel) blends fantasy with crime in a hallucinatory story set in two cities that occupy the same space.

The Once and Future King , T.H. White

Well, you can’t have a list of essential fantasy novels without a little Arthurian legend, now can you? Though the traditional stories have been reinterpreted time and time again, White’s version is a classic, once described by fantasy historian Lin Carter as “the single finest fantasy novel written in our time, or for that matter, ever written… I can hardly imagine that any mature, literate person who has read the book would disagree with this estimate.”

The Mists of Avalon , Marion Zimmer Bradley

Speaking of Arthurian legend, you may want to pair your White with a little Bradley. Her 800+ page tome retells the myths from the perspective of their female characters, usually so securely marginalized, and is widely recognized as one of the best and most original interpretations around.

Zone One , Colson Whitehead

Literary types longing to dip a toe into the sci-fi horror realm would do well to start with highbrow author Colson Whitehead’s second dive into genre fiction (see also: The Intuitionist). Zone One takes place in post-pandemic Manhattan, following a crew of survivors sweeping the city for any remaining “skels.” Whitehead’s introspective understated approach elevates this zombie tale, his psychological realism guaranteeing the story will stick with you far longer than the latest Walking Dead episode.

The Harry Potter series, J.K. Rowling

These books are beloved for good reason: they’re satisfying, entertaining, and often quite funny, especially to an adult reader. But if nothing else, you should read them because of the major impact they’ve had on our culture, both literary and otherwise.

The Time Quartet , Madeleine L’Engle

The first book in this series, A Wrinkle in Time introduced so many readers to science fiction that it would be irredeemably negligent to leave it off the list. After all, that’s where we met Meg Murray, neither witch, nor princess, nor damsel in distress, but just a super-geek with her family on the line, who saves her father from the forces of evil, brilliant little brother and schoolgirl crush in tow.

The Chronicles of Narnia , C.S. Lewis

If A Wrinkle in Time is where many of us found sci-fi, The Chronicles of Narnia is where we found fantasy. If you’re reading this list, you probably already know: Lewis is a master.

His Dark Materials , Philip Pullman

And where you have Narnia, you must also have the anti-Narnia. But regardless of ideological differences, it’s better to have both the land beyond the wardrobe and the brilliant world of Pullman’s His Dark Materials, featuring rips in time, daemons, armored bears, and one of the coolest fantasy protagonists of all time, the oh-so-intuitive Lyra Silvertongue.

The Female Man , Joanna Russ

Russ’s 2011 obituary described her as a writer who helped “deliver science fiction into the hands of the most alien creatures the genre had yet seen — women.” Indeed, she was part of the vanguard of female writers of sci-fi and scholars of the same. The Female Man is the most famous of her books, following four women living in parallel universes who meet, each ultimately changing her ideas of what it does and should mean to be a woman in her particular world — and the world at large.

Twenty Thousand Leagues Under the Sea , Jules Verne

Here’s another pillar of science fiction, written in 1870 and still rippling into pop culture in myriad ways today. It’s also a rollicking good adventure story.

Brown Girl in the Ring , Nalo Hopkinson

Hopkinson’s first novel was awarded the 1999 Locus Award for Best First Novel, and earned her the John W. Campbell Award for Best New Writer the same year. In a future dystopic Toronto, young mother (and granddaughter of a voodoo priestess) Ti-Jeanne begins to have some disturbing visions. Perhaps she will save the city.

Solaris , Stanislaw Lem

The best known of Polish sci-fi giant Stanislaw Lem’s works, Solaris is a philosophical novel that investigates the limitations of man and of communication. As a team of human scientists study Solaris, they are unaware that they too are being studied – by what appears to be the planet itself but is in fact a huge planetary organism, possessed of its own conscious intelligence.

The Hitchhiker’s Guide to the Galaxy , Douglas Adams

The gold standard in goofy science fiction.

The Dune Chronicles, Frank Herbert

Dune is one of the world’s bestselling science fiction novels for a reason. Herbert has created a satisfying, complex universe — all the detailed history and budding heroes of Tolkien, with just a few more giant sandworms, political/ecological intrigues, and magical spices that prolong life. And as Jon Michaud recently pointed out at The New Yorker’s Page-Turner, “With daily reminders of the intensifying effects of global warming, the spectre of a worldwide water shortage, and continued political upheaval in the oil-rich Middle East, it is possible that Dune is even more relevant now than when it was first published.”

Nineteen Eighty-Four , George Orwell

Here’s another classic that has in many ways transcended the sci-fi label, perhaps because of its lack of out-there futuristic technology or aliens of any kind. While dystopian for sure, it’s often classified as social science fiction, telling of a future that keeps on inching closer the further behind we leave that titular year.

Snow Crash , Neal Stephenson

Stephenson has a few novels worthy of this list, but a novice should start with Snow Crash, a wild genre mash-up of history, philosophy, sci-fi, cyberpunk and something all Stephenson’s own. Irreverent and widely influential at the same time, this is the book that established Stephenson as a major writer.

The Stars My Destination , Alfred Bester

Bester’s classic is a sci-fi retelling of Alexandre Dumas’ The Count of Monte Cristo, and an early anticipator of the cyberpunk genre. It’s an epic, blood-pumping adventure, furious and darkly comic, and it will probably make you dream of jumping wherever you want to go on a moment’s notice.

Neuromancer , William Gibson

The first novel ever to win the “triple-crown” of major science-fiction prizes (the Nebula Award, the Philip K. Dick Award, and the Hugo Award) and the book that popularized the term “cyberspace.” Not to mention that it’s a seminal cyberpunk masterpiece.

American Gods , Neil Gaiman

Again, much of Gaiman’s work could find a home here, but American Gods, his beloved road trip/theology novel, is a great place to start.

The Foundation series, Isaac Asimov

Without a doubt, Asimov’s Foundation series is one of the most important works of American science fiction. In 1965, the series was awarded a special Hugo Award for “best all-time series” (beating out The Lord of the Rings, no less), an honor that has still not been bestowed on any other set of books.

Discworld , Terry Pratchett

The only problem with delving into Pratchett’s hilarious fantasy universe is that you might not be able to stop – and with 40 novels in the series, you might not come up for air for quite a while. That said, it’s probably worth it – these bestselling books cull from all corners of the literary and mythological universe, and manage to be both satirical and satisfying on their own merit.

Alice’s Adventures in Wonderland , Lewis Carroll

When you think “fantasy,” you tend to think dragons and books with maps in the endpages, not our familiar, if surreal, Wonderland. Still, how else to describe it? Fantasy, and some of the best.

Among Others , Jo Walton

Walton’s delightful novel, which won the Nebula Award for Best Novel, the Hugo Award for Best Novel and the British Fantasy Award, is a must for any fan of fantasy or science fiction – not least because the book itself, presented as the journals of a 15-year-old reader, is an ode to the fantastical as well as a compelling, complex fairy tale in its own right.

Brave New World , Aldous Huxley

A major classic that you probably read in high school. If not, time to get on it.

The Last Unicorn , Peter S. Beagle

In this classic fantasy novel, the eponymous last unicorn embarks on a quest to discover what has become of the rest of her kind. Dreamy and colorful, it is a tale for readers of every age.

The Drowned World , J.G. Ballard

There’s post-apocalyptic fiction, and then there’s Ballard. The Drowned World is set in a futuristic London, where the apocalypse has turned the world into a sweltering dreamscape, and the surviving humans find their minds and impulses turned inside out. Extraordinary.

Witch World , Andre Norton

Look, if you’re a fan of either science-fiction or fantasy, you’ve got to read at least one Andre Norton novel. Good news: she’s written about a million of them. But if you want a little direction, you might start with Witch World, which blends the genres elegantly and – oh yes – kicks off a series chock full of more action.

Something Wicked This Way Comes , Ray Bradbury

The scariest carnival ever committed to paper, from a literary master.

The Time Machine , H.G. Wells

This is the book that popularized the idea of time travel, a concept that has formed the backbone of many, many works of fantasy and sci-fi since. Why not start at the beginning?

Never Let Me Go , Kazuo Ishiguro

As far as we’re concerned Mark Romanek’s film adaptation did a major disservice to Ishiguro’s great dystopian novel, which follows the intertwined lives of three students at a boarding school for “donors,” an underclass destined to die young after providing healthy organs to “normal” humans.

Little, Big , John Crowley

This book is fantasy’s stab at a Great American Novel — a sweeping, magical-realist epic that spans four generations, filled with true love, prophecies, creaky old houses, and oh, fairies. Crowley’s writing is gorgeous, and this elegantly rendered tale is one for the ages.

The Dragonriders of Pern series, Anne McCaffrey

If you’re mostly into fantasy for the dragons, look no further than Anne McCaffrey. The first book in this series, Dragonflight, is in part comprised of two earlier novellas which made McCaffrey the first woman to win both a Hugo and a Nebula award.

How to Live Safely in a Science Fictional Universe , Charles Yu

A rising star in contemporary science fiction, Yu has managed to write a novel that both pays homage to and transcends its own genre. Meta and deeply empathetic at once, it’s a triumph of family and time travel.

The Enchanted Forest Chronicles , Patricia C. Wrede

This series may not be as major as some of the others on this list, but it should be. Wrede’s Princess Cimorene is one of the most kick-ass fantasy heroines of all time (she runs away from her perfect life so she can study Latin and make cherries jubilee with the dragons), and her fairy tale mash-up world is endlessly fascinating. Plus, we sort of need some more wizards-are-bad stories on the table.

The Castle trilogy, Diana Wynne Jones

If you’ve seen Hayao Miyazaki’s Howl’s Moving Castle, you should take a look at the (much different) original novel. Jones’ works are filled with color and humor, and her original spin on things never fails to delight.

The Giver , Lois Lowry

One of the most surprising and quietly terrifying books for children ever written, this is one that will stick with you from your formative years until your last.