space and time

Kate, Michael, and Emma have passed from one orphanage to another in the ten years since their parents disappeared to protect them, but now they learn that they have special powers--and a fearsome enemy--and embark on a prophesied quest to find a magical book.

With his ability to travel through time by using baseball cards, Joe goes back to 1947 to meet Jackie Robinson, turning into a black boy in the process.

Thirteen-year-old Jonah, stolen from the past as an infant, teams up with his sister Katherine to help Virginia Dare, the first child born in America to English parents.

Sam, Joe, and Fred finish their school project on ancient Egypt without using their magical time travel book, but when Joe's sister Anna plays with it and travels to the land of pyramids, they must follow her back in time to bring her back to 1996.

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.

With the powers they acquire from a spinster who is studying to be a witch, three English children have a series of exciting and perilous adventures traveling on a flying bed that takes them to a London police station, a tropical island, and back in time to the seventeenth century.

The youngest of the Murry children must travel through time and space in a battle against an evil dictator who would destroy the entire universe.

Bullied in school and called "Piggy MacFartland," twelve-year-old Iggy longs to travel to another planet and live among extraterrestrials, until an explosion transports him to a scary alternate reality.

Friends Brian and Gregory have survived the Game of Sunken Places, but are once again drawn back to cousin Prudence's house in Vermont, where they discover that something has gone very wrong with time, people have disappeared, and danger is lurking everywhere.

Eleven-year-old orphan Tommy Learner's world in 1900 New York City collides with that of twelve-year-old, modern-day Jezebel Lemon in the basement of her apartment building, where together they must use the portals between worlds to thwart the Dead Gentleman, a legendary villain whose last unconquered world is the planet Earth.