When Amy Lennox and her mother move from Germany to Scotland to live in her mother's childhood home of Lennox House on Stormsay Island, Amy begins to learn to use her powers as a book jumper. Her grandmother, Lady Mairead, insists that Amy and Will ?Macalister, another book jumper, must read the books of the house, jumping into their stories by magic, in order to stop a mysterious thief who has been stealing ideas from the books. The stakes are raised when it appears this thief may also be after Amy's life.