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 story begins at the turn of the previous century, with the young H. G. Wells writing and rewriting the fantastic tale that became his first book and an international sensation: The Time Machine. It was an era when a host of forces were converging to transmute the human understanding of time, some philosophical and some technological: the electric telegraph, the steam railroad, the discovery of buried civilizations, and the perfection of clocks....

With their house in foreclosure, sisters India and Mouse and brother Finn are sent to stay with an uncle in Colorado until their mother can join them, but when the plane lands, the children are welcomed by cheering crowds to a strange place where each of them has a perfect house and a clock that is ticking down the time.

At nearly fifteen years of age, Joey Harker learns that he is a Walker, able to travel between dimensions, and soon joins a team of different versions of himself, each from another dimension, to fight the evil forces striving to conquer all the worlds.

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.

Four cousins, Roger, Ann, Eliza, and Jack, have an extraordinary summer when, after an old toy soldier comes to life, they find themselves transported back to the days of Robin Hood and Ivanhoe.

As a seventeen-year-old sophomore at NYU, Casey wears different disguises to fit in, but when she starts hearing voices and seeing visions, she travels to a remote beach town and searches for answers.

As the Scion's guardian, Johnny Turnbull is expected to begin training as a Space Jumper, a role he promised his girlfriend Max he would never take on, and which might not be enough to save his sister and friends when Orbis is threatened.

In this third book about Omri and his magic cupboard, Omri and his friend Patrick must risk grownups' discovering their secret when they find themselves in need of a friend's toy plastic doctors to save wounded people from the dangerous world of the Old West which the cupboard enables them to enter.

Seventeen-year-old Laz Hayerian wakes up on an abandoned Earth to discover that he and his companion Ivy Downey are clones, and they must work together--combining their talents to sense and step into and out of timestreams--to save humanity from imminentextinction.