A cousin is a relative with the useful habit of arriving from somewhere else. They know the family rules but not the rules of your house; they can be a best friend, a rival, or the person who turns an ordinary week at the grandparents’ into a small republic with its own passwords and laws. Children’s books understand the peculiar freedom of the relationship. Cousins may not share a bedroom or a school bus, which leaves them room to become co-conspirators — and enough distance to notice when one of them has changed.
Drawing from Bookroo’s collection of 297 books about cousins, our editors chose thirteen where the cousin relationship does real work: visits that go wrong before they go right, letters crossing a border, reunions after a move, and summer adventures that become family history. Start with the fixed shortlist below, then browse the picture-book and chapter-book shelves by age. For a larger family gathering, try family reunions and relatives; for the people a child goes home with afterward, head to siblings.
A flying squirrel's odd ways challenge his cousins to see fun in differences.
Can friendship endure when distance separates best-friend cousins?
Two cousins discover their lives are more alike than different across borders.
Ravi fears change as summer with cousins brings unexpected challenges.
A girl spends the annual cousin visit trying to earn a nickname as memorable as everyone else’s.
Lila's plans with her cousins go awry, but a surprise awaits that changes everything.
A young girl in Africa dreams of seeing snow amidst her vibrant family life.
In 1935, Turtle discovers family secrets and buried treasure in Florida.
Two children uncover secrets at a ghostly lakeside resort.
A cousin steps onto the London Eye and does not step off, leaving two siblings to work out how he vanished.
A girl uncovers family secrets and hunts for treasure during a chaotic summer at a mysterious camp.
A summer on the Hungarian plains turns thrilling with unexpected adventures and dangers.
Two cousins approach Juneteenth differently until their great-great-aunt tells them what the day meant when she was a child.
Read-alouds about the cousin coming to stay, the favorite cousin moving away, crowded summer visits, and learning that family can do everything differently and still belong together. Ages 3–8.
P.J. Funnybunny's family discovers true mischief when cousin Binky visits.
A penguin from Pluto plots Earth's takeover. Can Ricky and his robot stop him?
A boy and his robot must stop an alien invasion from Neptune
A girl seeks the perfect gift for her new baby cousin.
Freddy's holiday turns wild with his mischievous twin cousins.
Wild squirrels celebrate Christmas in whimsical miniature worlds.
A lonely Christmas leads to a surprising discovery of Santa in town.
Annie seeks the perfect pet—soft, dry, and quiet. What will she choose?
Explore a lively neighborhood through fun poems and vibrant art.
Lester battles a relentless onslaught of hideous sweaters from Cousin Clara. Can he escape this woolly nightmare?
A snow day promises fun and adventure for Annie, Henry, and Mudge.
Annie's birthday party holds an unexpected surprise.
Longer stories where cousins solve mysteries, inherit old family trouble, spend a summer under one roof, and discover how quickly a relative can become an ally. Ages 6–12.
A lonely girl discovers a hidden garden with a mysterious key.
Two cousins travel back in time to the Viking era and meet Erik the Red and his son Leif Eriksson.
A dragon's mysterious need leads to a daring rescue mission against a wicked foe.
Two girls must escape a cruel governess to save their home.
A baseball bat is stolen from a famous player and two kids try to solve the mystery.
A group of kids try to figure out what is happening when their friends and pets start disappearing.
A private island, a secretive family, and a friendship that turns destructive. What truth lies beneath the lies?
Time-traveling kids must clear an orphan's name and find a missing friend.
Danny's summer camp turns wild with a jackalope-napping mystery.
A silver kitten brings unexpected magic to Kim's troubled week.
Tristan Strong must confront King Cotton in a final showdown along the Mississippi.
Two cousins face off in the Little League World Series. Only one can win.
