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.

When Emily makes a wish on a magic stone, she gets a glimpse of what the future holds--and it's a disaster! She tries to make things right, but each trip through time takes Emily to a future where things turn out badly for either the humans of Brightport or the merpeople of Shiprock. Plastic pollutes the ocean, garbage overflows the landfills, and the two towns are no longer getting along. Emily realizes she can't save her hometown and the ocean alone,...

Artemis's mother has contracted a deadly disease -- and the only cure lies in the brain fluid of African lemurs. Unfortunately, Artemis himself was responsible for making the lemurs extinct five years ago. Now he must enlist the aid of his fairy friends to travel back in time and save them. Not only that, but he must face his deadliest foe yet...his younger self.

After Ashley and Kristi find an antique doll buried in old Miss Cooper's garden, they discover that they can enter a ghostly turn-of-the-century world by going through a hole in the hedge.

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.

Ethan Cheeseman takes his children, ages eight, twelve, and fourteen, and Captain Jibby and crew, to the year 1668 to end an ancient family curse and save the children's mother, but damage to the time machine and the arrival of Mr. 5 complicate their return.

"It was a dark and stormy night; Meg Murry, her small brother Charles Wallace, and her mother were in the kitchen for a midnight snack when they were upset by the arrival of a most disturbing stranger. 'Wild nights are my glory,' the unearthly stranger told them. 'I just got caught in a downdraft and blown off course. Let me sit down for a moment, and then I'll be on my way. Speaking of ways, by the way, there is such a thing as a tesseract.' A tesseract...

"A boy with extraordinary powers. An army of deadly monsters. An epic battle for the future of peculiardom. The adventure that began with Miss Peregrine's Home for Peculiar Children and continued in Hollow City comes to a thrilling conclusion with Library of Souls. As the story opens, sixteen-year-old Jacob discovers a powerful new ability, and soon he's diving through history to rescue his peculiar companions from a heavily guarded fortress. Accompanying...

Dak, Sera and Riq might be in over their heads when they attempt to stop a Viking invasion!

Rescued from imminent death, teens Maddy, Liam, and Sal join forces in 2001 Manhattan to correct changes in history made by other time travelers, using a "time bubble" surrounding the attack on the Twin Towers to hide their journeys.