Sylvie has been a twelve-year-old princess for more than eighty years, ever since the book she lives in was first printed. She's the heroine, and her story is exciting -- but it's always exciting in the same way. That's the trouble. Sylvie has a restless urge to explore, to accomplish a Great Good Thing beyond the margins of her book. This time, when the new face appears, Sylvie breaks the rule of all storybook characters: "Never look at the Reader." Worse, she gets to know the reader, a shy young girl named Claire, and when Claire falls asleep with the book open, Sylvie enters her dreams.

After a fire threatens her kingdom, Sylvie rescues the other characters, taking them across the sea in an invisible fish that rolls up like a window shade when it's out of water. For years they all live, royalty and rogues, in Claire's subconscious -- a surprising and sometimes perilous place.

In this new land, Sylvie achieves many Good Things, but the Greatest, like this dazzling book, goes far and deep, beyond even her imaginings.