"All it takes is one hit on the football field, and suddenly Ash's life doesn't look quite the way he remembers it. Impossible though it seems, he's been hit into another dimension--and keeps on bouncing through worlds that are almost-but-not-really his own. The changes start small, but they quickly spiral out of control as Ash slides into universes where he has everything he's ever wanted, universes where society is stuck in the past...universes...

Thirteen-year-old Lucy Eberslee, the Gatekeeper's deputy at the end of the world, teams up with Arthur and Rosemary, who are from other worlds, to investigate why the doors between worlds are stuck.

When an all-consuming void from the Fourth Dimension opens up, unleashing monsters throughout the Realities, Mister George has one last weapon at his disposal--the mysterious and powerful Karma button, which might be even more dangerous than anyone imagined.

The magic tree house takes Jack and Annie to an African rainforest, where the siblings encounter gorillas and learn to communicate with them.

An astounding new feat of storytelling from Brian Selznick, the award-winning creator of The Invention of Hugo Cabret and Wonderstruck. A ship. A garden. A library. A key. In Kaleidoscope, the incomparable Brian Selznick presents the story of two people bound to each other through time and space, memory and dreams. At the center of their relationship is a mystery about the nature of grief and love which will look different to each reader. Kaleidoscope...

When Amelia and Charlie get caught in a time loop at the Gateway Hotel, they are forced to live the same day over and over. Each loop brings them closer to catching a suspicious alien visitor--but also closer to danger. Can they stop time to save their lives?

When some unauthorized visitors arrive through the gateway, chaos breaks loose-- and threatens to spoil Amelia's birthday! What are the visitors looking for, and can she and Charlie stop them before it's too late?

Beth and her cousin Patrick travel in Mr. Whittaker's invention, the Imagination station, to 1000 A.D. Greenland, where they meet Erik the Red and Leif Eriksson and witness the spread of Christianity in that country.

When time-traveling cousins Patrick and Beth use the Imagination Station to go to Plymouth Colony in 1621 hoping to find Hugh and return him to his own time, they meet William Bradford, Myles Standish, and Squanto.