Thirteen-year-old Nina is imprisoned by the Population Police, who give her the option of helping them identify illegal "third-born" children, or facing death.

In the year 241, twelve-year-old Lina trades jobs on Assignment Day to be a Messenger to run to new places in her decaying but beloved city, perhaps even to glimpse Unknown Regions.

In a future where the law limits a family to only two children, third-born Luke has been in hiding for the entire twelve years of his life, until he enters boarding school under an assumed name and is forced to face his fears.

When thirteen-year-olds Jonah and Chip, who are both adopted, learn they were discovered on a plane that appeared out of nowhere, full of babies with no adults on board, they realize that they have uncovered a mystery involving time travel and two opposing forces, each trying to repair the fabric of time.

After being captured by the Recons and returned to civilization for reprogramming, Roz is sent to Hilltop Farm where she befriends her owner's family and animals, but pines for her son, Brightbill.

Little Jon, who lives in another world, is watching the shooting stars streaming across the sky when suddenly he falls through the door - the one that leads to another place, the one that has been closed for so long. So he starts down the mountain in search of people to help him. It is a strange journey, full of mystery and magic.

Meg Murry can't help but be worried when her six-year-old brother, Charles Wallace, announces there are dragons in the vegetable garden. He's so bright and so different from other kids, he's getting bullied at school, and he is also strangely, seriously ill. But Charles Wallace is right about the dragons--actually a friendly entity who has come to help Charles Wallace fight his sickness. Meg and her friend Calvin O'Keefe join the dragon on a terrifying,...

When someone uses futuristic technology to play pranks on twelve-year-old Dorso Clayman, he and his best friend set off on a supposedly impossible journey through space and time trying to stop the gamesters who are endangering the universe.

When aliens abduct both Leo and his artist friend Tim, Leo tries to determine why these creatures from outer space want particularly to use his friend's talent.

In a society that allows families to have only two children, third child Matthias joins the Population Police to infiltrate their system.