An ordinary girl waking up in an extraordinary world where art is revered, history is changeable, and students travel though time, Natasha Clarke experiences the wonders of the past and discovers her true origins--and her destiny.

The magic tree house takes Jack and Annie back in time to feudal Japan where the siblings learn about the ways of the Ninja.

"Forced to pair up with Killian on a new assignment in Renaissance Italy, Natasha soon discovers his task is nothing like hers and learns the startling truth behind Arthur's ultimate invention that would allow him to control time--and control the world"-- Provided by publisher.

After falling for Kate, her unexpected death sends Jack back in time to the moment they first met, but he soon learns that his actions have consequences when someone else close to him dies.

George and Harold are forced to contemplate a world without Captain Underpants.

When time traveling students from a British magic school warn of a coming world war, Fort and his friends at the Oppenheimer magic school try to change the future without making things worse.

"After thirteen-year-old Anna Armstrong loses her parents in an accident, she is sent to live on her Uncle Jack's farm. She is despondent, but on her first night there, she is awoken by strange lights originating from a nearby lake. She sets out to investigate--and the skies suddenly erupt in a thunderous explosion. That's when Anna sees a mysterious woman floating across the lake. She discovers Mara--the woman on the lake--is a time traveler on the...

While backpacking in the desert, thirteen-year-old Mark falls into a tube of blue light and is transported into a more primitive world, where he must use his knowledge and skills to survive.

Thanks to Dr. Bunsen's latest wacky invention, second-graders Gabriel, Laura, and Caesar, aka the DATA Set, are blasted back to the prehistoric era, where they quickly find themselves dashing from flying pterosaurs, stomping stegosaurus stampedes, and a sharp-toothed T-rex.

When nine-year-old Odessa Green-Light stomps out her frustration at being sent to her room after shoving her annoying little brother, one particularly big stomp sends Odessa flying through the floorboards and mysteriously twenty-four hours back in time.