Even as he grows stronger and closer to discovering the secret of his identity, Arthur must face further dangers and conflicts as he struggles to attain the Sixth Key from the powerful Saturday.

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 imminent extinction.

Dana, a modern black woman, is celebrating her twenty-sixth birthday with her new husband when she is snatched abruptly from her home in California and transported to the antebellum South. Rufus, the white son of a plantation owner, is drowning, and Dana has been summoned across the years to save him. After this first summons, Dana is drawn back, again and again, to the plantation to protect Rufus and ensure that he will grow to manhood and father...

"If you could go back, who would you want to meet? In a small back alley of Tokyo, there is a café that has been serving carefully brewed coffee for more than one hundred years. Local legend says that this shop offers something else besides coffee--the chance to travel back in time. Over the course of one summer, four customers visit the café in the hopes of making that journey. But time travel isn't so simple, and there are rules that must be followed....

Through a freak of nature, the island of Nantucket is transported 3,000 years back in time. The novel describes the way its inhabitants adjust to primitive living and the reaction of the Indians on the mainland. By the author of The Ship Avenged.

Once again, Artemis will have to pair up with his old comrade, captain Holly Short, to track down the missing demon and rescue him before the time spell dissolves and the lost demon colony returns violently to Earth.

Esmeralda, who is both a princess and a powerful witch, must travel back in time to end a family curse or risk losing her true love, Prince Eadric, forever.

Thirteen-year-old Jonah has always known that he was adopted, and he's never thought it was any big deal. Then he and a new friend, Chip, who's also adoped, begin receiving mysterious letters. The first one says, "You are one of the missing." The second one says, "Beware! They're coming back to get you."

Jonah, Chip, and Jonah's sister, Katherine, are plunged into a mystery that involves the FBI, a vast smuggling operation, an airplane that...

This book explores what time means and how it has been measured, from the waggles of a honeybee to the workings of an atomic clock.

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.