Pulled through a glass that brings him back in time, Septimus Heap becomes theapprentice of an alchemist.

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.

When Artemis Fowl's mother contracts a life-threatening illness, his world is turned upside down. The only hope for a cure lies in the brain fluid of the silky sifaka lemur. Unfortunately, the animal is extinct due to a heartless bargain Artemis himself made as a younger boy. Though the odds are stacked against him, Artemis is not willing to give up. With the help of his fairy friends, the young genius travels back in time to save the lemur and bring...

"Miss Z, a mysterious billionaire and a collector of rare photographs, is sending her four recruits back in time on a mission to capture, for the first time, one of the most important moments in American history-- Abraham Lincoln giving his famous Gettysburg address"--

When he receives the cryptic message that "time is running out," Owen, known as "The Navigator," summons Cati and Dr. Diamond and together they journey to the City of Time in order to discover what has gone wrong.

When eight-year-old Jack and his seven-year-old sister, Annie, join a group of nineteenth-century explorers aboard the H.M.S. Challenger, they learn about the ocean, solve the mystery of its fabled sea monster, and gain compassion for their fellow creatures.

When the magic tree house whisks Jack and Annie off to Greenland, they're not sure what time they've landed in, but they immediately know what their mission is: save a narwhal! Then they meet a young hunter named Leif Erikson and they ask for his help. But Leif has other ideas...

When thirteen-year-olds Jonah and Chip, who are both adopted, learn they werediscovered 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.

Owen is trapped in a time travel plot-your-own-adventure book, controlled by the reader, and a bizarre fellow prisoner, Kara Dox, might be his only hope for escaping to save Bethany.

Marcus is in trouble. He didn't think his friend Laurence would actually believe him when he said that his super brainy aunt built the very first time machine. He only made up the story in a spur-of-the-moment bid to win a silly argument! Now how on earth will he make the story come true?