After celebrating their first nine same-day birthdays together, Amanda and Leo, having fallen out on their tenth and not speaking to each other for the last year, prepare to celebrate their eleventh birthday separately but peculiar things begin to happen as the day of their birthday begins to repeat itself over and over again.

When eleven-year-old Olive and her distracted parents move into an old Victorian mansion, Olive finds herself ensnared in a dark plan involving some mysterious paintings, a trapped and angry nine-year-old boy, and three talking cats.

I.Q., a pet mouse, learns to tell time along with the rest of Mrs. Furber's class and worries about whether he will have his special project ready in time for Parents' Night.

Teenaged criminal mastermind Artemis Fowl must save the underwater fairy metropolis of Atlantis from danger, while battling a psychological affliction known as the Atlantis Complex.

The magic tree house whisks Jack and Annie away to Australia where they must save some animals from a wildfire.

After his parents are kidnapped, timid twelve-year-old Henry York leaves his sheltered Boston life and moves to small-town Kansas, where he and his cousin Henrietta discover and explore hidden doors in his attic room that seem to open onto other worlds.

When time goes backwards, granting six-year-old Otto his wish that his attention-stealing baby sister was never born, it keeps going backwards, and Otto finds himself getting younger and younger.

Eleven-year-old Olive finds herself drawn to the grimoire of the witches who built her house and tries to use its spells to uncover the house's magic and control the cats themselves, but the book is more wicked than it seems.

"Inspired by the question, "What are they doing right at this moment on the other side of the world?" this book focuses on natural and human events happening all over the world in the same second. Talking about the world and how it's so different in places but also so similar and shared, so incredible and surprising, the books takes us to New York, Chicago, Mexico, Portugal, Angola, Turkey, Greece, Italy, Hungry, Brazil, and South Africa, among others....

When a medieval princess appears out of a rusty box bought at a yard sale, fourteen-year-old tomboy Casey Peabody and her family are stuck with her royal snobbiness until the young wizard who had trapped her there figures out the spell to send her home.