When Milo's uncle and Tilly's grandfather are poisoned by a mysterious copy of The Wizard of Oz and fall into a deep sleep, Milo and Tilly travel to the Emard City to find out who is behind the poisoning.

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.

"The Joneses have just won the Great Montgomery Book Emporium in a contest, and it's every book lover's dream! The pull of a lever calls forth a room full of marvelous wonders -- from the Room of Woodland tales with its squirrels and mice, to the rocket ship in the Room of Space Adventures, and the aquarium ceiling in the Room of Ocean Tales. But there is more to the Emporium than its thousands of books in extravagant displays. In fact, the previous...

Archie Greene has lived with his grandmother since he was a baby, but when a mysterious package arrives on his twelfth birthday with instructions to take it to a strange bookshop in Oxford, he finds himself involved with a secret society of people who protect the world's magical books, and discovers that he has family he never knew about.