Faced with a dull summer in the city, Jane, Mark, Katharine, and Martha suddenly find themselves involved in a series of extraordinary adventures after Jane discovers an ordinary-looking coin that seems to grant wishes.

Jack and Annie are joined by Teddy and Kathleen as they travel to the snowy Land-Behind-the-Clouds, where they search for the eye of the Ice Wizard and attempt to help Merlin and Morgan.

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.

Having used their magic tree house to travel to India, where they must get a gift to help free the dog Teddy from a spell, Jack and Annie have adventures involving a tiger and other endangered jungle animals.

After moving with her parents to Iowa, twelve-year-old Lucy discovers a mysterious notebook that can bring stories to life and which has a link to the 1914 disappearance of her great uncle.

"The award-winning, best-selling author of Station Eleven and The Glass Hotel returns with a novel of art, time, love, and plague that takes the reader from an island off Vancouver in 1912 to a dark colony of the moon three hundred years later, unfurling a story of humanity across centuries and planets." -- Provided by publisher.

When demons begin appearing on Earth unpredictably, foreshadowing a cataclysmic breakdown of their magic, Artemis and his friends face a new foe--a twelve-year-old girl whose intellect just might match Artemis's own--as they try to prevent a catastrophe.

"From the Pulitzer Prize-winning author of perhaps the most bestselling and beloved literary fiction of our time comes a triumph of imagination and compassion, a soaring novel about children on the cusp of adulthood in a broken world, who find resilience, hope, and story. The heroes of Cloud Cuckoo Land are children trying to figure out the world around them, and to survive. In the besieged city of Constantinople in 1453, in a public library in Lakeport,...

As her mother prepares to be a contestant on the 1970s television game show, "The $20,000 Pyramid," a twelve-year-old New York City girl tries to make sense of a series of mysterious notes received from an anonymous source that seems to defy the laws of time and space.

"All it takes is one hit on the football field, and suddenly Ash's life doesn't look quite the way he remembers it. Impossible though it seems, he's been hit into another dimension--and keeps on bouncing through worlds that are almost-but-not-really his own. The changes start small, but they quickly spiral out of control as Ash slides into universes where he has everything he's ever wanted, universes where society is stuck in the past...universes...