Eleven-year-old Tilly Pages, who has found comfort in her grandparents' bookshop since her mother's disappearance, now learns that she can bookwander into any stories, and decides to seek her mother.

"Tilly and Oskar embark on an impromptu trip to the Library of Congress in Washington, DC, in search of an elusive group of bookwanderers called the Archivists, who they believe are the key to restoring the balance and saving the British Underlibrary. Along the way, the friends realize that something strange is happening in the world of bookwandering: books are disappearing, people are forgetting their favorite stories, and stories are trying to drag...

"When Milo, Tilly, Oskar, and Alessia venture into Arthurian legend to find the first bookwanderer--the wizard Merlin--they discover that the magic of bookwandering is not at all what they thought. Together, they must journey into Greek and Roman mythology to bargain with the trickster Loki and find a way to untangle the Alchemist's grip on the world's imagination. And to save Pages & Co. and protect the very foundations of bookwandering, the friends...