"As far as twelve-year-old McKinley O'Dair is concerned, the best thing about living in Gap Bend, Pennsylvania, is the Time Hop--the giant party the town throws every June to celebrate a single year in history. That one day is enough to make the few things that aren't so fantastic about McKinley's life--like her crabby homeroom teacher or her super-scheduled father--worth suffering through. And when McKinley learns that this year's theme is 1993,...

"Mason and Ty were once the very best of friends, like two nerdy sides of the same coin . . . until seventh grade, when Ava Petrakis came along. Now Mason can trace everything bad in his life to that terrible fight they had over the new girl. The one thing he'd give anything for is a do-over. But that can't happen in real life--can it? As a science kid, Mason knows do-overs are impossible, so he can't believe it when he wakes up from a freak accident...

Twelve-year-old Boomi accidentally travels back in time to 1986 Thumpton-on-Soar, England, where she meets her late father as a child, changing her life forever

A scientist invents a machine that transports him far into the future where he discovers a changed world inhabited by two unusual races, the Eloi and the Morlocks.

Days before his thirteenth birthday, science-lover Finn learns that the women of his family are time travelers and he is expected to help locate his missing mother.--

After sixty years of trying to stop Paradox and set the universe right again, Finn time-travels to get help from his nine-year-old self.

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.

FBI agent Chevie Savano escapes into the past to elude the secret police after they kill Charles Smart just as he is telling her of the WARP program, and she and Riley team up to find Colonel Clayton Box before he can launch missiles at the capitals of Europe.

Using a mysterious wardrobe that allows them to travel through time, two eleven-year-olds, Federico a boy from the Italian Renaissance and Bee a girl from present-day New Jersey, work together to prevent the bickering between two great artists from changing the future.

This time Ranger, the time-travelling Golden retriever finds himself transported to the deck of the USS Arizona on December 7, 1941, where he rescues the young sailor Ben Hansen who is badly burned when the ship explodes--and there is a Japanese-American boy and girl in a rowboat who also need his help to find their father amid the chaos of the attack.