The Best Found Family Sci-Fi Books (When Blood Isn't Thicker)

The found family trope hits harder in science fiction than anywhere else.

Maybe it’s because sci-fi often starts with displacement—characters ripped from home by war, exile, or the simple vastness of space. Maybe it’s because futuristic settings let authors strip away the social scaffolding we take for granted and show what people build when they have to build from nothing.

Whatever the reason, some of the best character work in science fiction comes from watching strangers become crew, soldiers become siblings, survivors become the only family that matters.

These eleven books do found family right.

The Crew Becomes Family

1. Firefly (Serenity) by Various Authors

Start with the show, but the comics and novels expand the ‘verse. Mal Reynolds captains a ship of misfits—a soldier, a mechanic, a mercenary, a courtesan, a preacher, and the brother-sister pair running from the Alliance.

They bicker constantly. They’d die for each other without hesitation. That tension is the heart of everything Firefly gets right about found family.

Why it works: The Serenity’s crew doesn’t pretend to be functional. They’re broken people who found each other.

2. Becky Chambers’ Wayfarers Series

Starting with The Long Way to a Small, Angry Planet, Chambers builds one of science fiction’s warmest found families. The crew of the Wayfarer tunnels wormholes for a living, but the real story is how a group of wildly different species and personalities become essential to each other.

Chambers writes characters who talk through their problems. It shouldn’t work as well as it does.

Why it works: Cozy sci-fi that earns its emotional payoffs through genuine connection.

3. The Expanse by James S.A. Corey

The Rocinante’s crew starts as survivors—Holden, Naomi, Amos, and Alex escape the destruction of the Canterbury and end up at the center of interplanetary conflict. Over nine books, they become family in every way that matters.

Corey (the pen name for two authors) excels at showing how crisis bonds people. The Roci crew would be strangers in peacetime. War makes them inseparable.

Why it works: The found family forms under pressure and proves itself through impossible choices.

4. The Murderbot Diaries by Martha Wells

Murderbot—a security robot who hacked its own governance module—doesn’t want a family. It wants to watch TV shows and be left alone. Unfortunately, the humans it protects keep mattering to it, and the found family that forms around Murderbot happens despite its best efforts to prevent it.

Wells writes found family as something that happens to you whether you’re ready or not. Murderbot’s reluctant attachment is painfully relatable.

Why it works: The protagonist actively resists connection, which makes each bond feel earned.

Survivors Become Siblings

5. The Ashborn Chronicles by Jacques du Preez

When Kael Ashborn is exiled to the Wastelands, he loses everything—his position, his love, his identity as a Citadel citizen. What he gains is something unexpected: a community of outcasts who’ve built their own society beyond the walls.

The clans of the Wastelands aren’t just survival groups. They’re families forged by shared hardship, and Kael’s integration into this world transforms him as much as any battle.

Why it works: Found family as the reward for surviving exile. The bonds form because everyone has already lost their first family.

Read Banished Free on Kindle Unlimited →

6. Six of Crows by Leigh Bardugo

Kaz Brekker assembles a crew of criminals for an impossible heist. Each member carries trauma that would break most people. Together, they’re something more than a gang—though none of them would ever admit it.

Bardugo writes found family as armor. The Crows protect each other because they know exactly how much the world can hurt.

Why it works: The characters are too damaged for easy sentiment. Every moment of connection costs something.

7. Red Rising by Pierce Brown

Darrow infiltrates Gold society alone, but he doesn’t stay alone. The Howlers—his warband—become brothers and sisters forged in the crucible of the Institute. Sevro, Mustang, the Telemanuses—they’re family by the end, in the way that combat makes family.

Brown writes found family as what survives when everything else burns.

Why it works: Shared trauma creates bonds that blood can’t match.

8. An Unkindness of Ghosts by Rivers Solomon

Aster lives in the lower decks of a generation ship, where class determines everything. She’s autistic, Black, and brilliant—and the community of marginalized people who become her family reflects the ship’s brutal hierarchy.

Solomon writes found family among the oppressed. These aren’t chosen connections; they’re necessary ones.

Why it works: Found family as survival strategy against systems designed to isolate.

Mentors and Proteges

9. Ender’s Game by Orson Scott Card

Ender Wiggin is isolated by design. The military wants him dependent on no one. But connection happens anyway—Bean becomes the closest thing to a brother, Petra to a friend, and even his relationship with his sister Valentine survives the system’s attempts to sever it.

The found family in Ender’s Game is subversive. It happens despite the institution’s best efforts.

Why it works: Found family as resistance to systems that want you alone.

10. The Fifth Season by N.K. Jemisin

Essun’s biological family is destroyed in the first chapter. What follows is a journey through a broken world where the connections she forms—with Hoa, with the community at Castrima, with the daughter she seeks—become a new definition of family.

Jemisin writes found family as what you build after catastrophic loss.

Why it works: The worldbuilding makes family fragile. Every connection carries weight.

11. Skyward by Brandon Sanderson

Spensa wants to be a pilot. Her father was branded a coward, and she has to prove herself against a system that wants her to fail. The friends she makes in flight school—her flightmates—become the family that believes in her when the world doesn’t.

Sanderson writes found family as what grows around outcasts. Spensa’s crew forms because they’re all, in some way, people the system rejected.

Why it works: Found family as validation. These people see you when others won’t.

Why Found Family Works in Sci-Fi

Science fiction strips away the default assumptions of home and belonging. Characters start displaced—by space travel, by exile, by apocalypse—and have to build connection from scratch.

That’s why found family hits harder in these settings. We’re not watching people discover they like their neighbors. We’re watching people who have every reason to stay isolated choose connection anyway.

The best found family stories understand that these relationships are work. They’re maintained through conflict, tested by betrayal, strengthened by sacrifice. The family you choose has to be chosen again and again.

Blood might be thicker than water—but water is what you need to survive.

What’s your favorite found family in sci-fi? Share below.