Could books hidden through the Book Scavenger game be linked to an arsonist's web of destruction? Find out in the New York Times-bestselling second book in the action packed Book Scavenger series by Jennifer Chambliss Bertman.

Mr. Quisling is definitely up to something mysterious, and Emily and James are on high alert. First, there's the coded note he drops at a book event. Then they uncover a trail of encrypted messages in Mark Twain-penned books hidden through Book Scavenger. What's most suspicious is that each hidden book triggers a fire.

As the sleuthing friends dig deeper, they discover Mr. Quisling has been hunting a legendary historical puzzle: the Unbreakable Code. This new mystery is irresistible, but Emily and James can't ignore the signs that Mr. Quisling might be the arsonist. The clock is ticking as the fires multiply, and Emily and James race to crack the code of a lifetime.

This sequel to the popular middle-grade Book Scavenger series is perfect for book-lovers who enjoy a thrilling adventure and a good mystery.

A Christy Ottaviano Book

Praise for The Unbreakable Code:

A New York Times bestseller
A Junior Library Guild Selection

Brisk, bookish good fun for puzzle and code lovers. --Kirkus Reviews

Books in the Book Scavenger series:
Book Scavenger
The Unbreakable Code