An unmissable milestone for fans of Sir Terry Pratchett: the first SF novel in over three decades in which the visionary inventor of Discworld has created a new universe of tantalizing possibilities-a series of parallel "Earths" with doorways leading to adventure, intrigue, excitement, and an escape into the furthest reaches of the imagination. The Long Earth, written with award-winning novelist Stephen Baxter, author of Stone Spring, Ark, and Floodwill,...

Jason Walker falls through a tunnel at the zoo and ends up in a new, utterly foreign world, a world with no heroes and no hope. Jason finds himself faced with the prospect of becoming the hero he never imagined he could be.

The Earth's leaders have drawn a line in the interstellar sand, despite the fact that the fierce alien enemy they would oppose is inscrutable, unconquerable, and very far away. Humans first bumped heads with the Taurans when we began using collapsars to travel the stars. Although the collapsars provide nearly instantaneous travel across vast distances, the relativistic speeds associated with the process means that time passes slower for those aboard...

Time-travelers Jonah and Katherine are summoned to help another missing child from history, this time Virginia Dare from the Roanoke Colony, but their journey is sabotaged and goes dangerously awry, leaving them in the wrong time period. Includes author's note about the history of Roanoke Colony and Virginia Dare.

Polly's visit to her grandparents in Connecticut becomes an extraordinary experience as she encounters old friends and mysterious strangers and finds herself traveling back in time to play a crucial role in a prehistoric confrontation.

Three ancient scrolls beckon high school student Aidan Thomas to enter a realm of knights, kings, and unusual creatures, but he must rely on instinct and his latent athletic ability to deal with the terror, tempest, and treason offered by this new world.

During a summer vacation in a secluded Welsh valley, three young people find themselves driven by the spirits of three mythical lovers to reenact an ancient tragedy.

When the Time Fetch's foragers gobble up too much time, causing the fabric of the universe to unravel and blur the boundaries between worlds and dimensions, eighth-grade loner Edward and his classmates must band together to save the day.

In 1938, three orphans--Theo, Carl, and Ian, ages ten to thirteen--lead three teachers through a portal that takes them from Dover, England, to Morocco in their quest to locate six silver boxes before the ancient prophecies therein are found by the evil Demogorgon's offspring.

"In this sequel to Twinmaker, the world's teleportation network has crashed, armies of dupes are attacking--and Clair must determine her allegiances, figure out how to find her mysterious online friend called Q, and stay alive"--