The Unbreakable Code
(The Book Scavenger #2)

Brisk, bookish good fun for puzzle and code lovers.

Gr 4-6--This second installment leaps in right where the first left off, with middle schoolers Emily and James on the trail of a new coded mystery. Things are heating up as an arsonist called The Phoenix leaves a trail of hidden books and small fires all over San Francisco. While worrying about family finances, figuring out what their teacher Mr. Quisling is up to, taking part in a historical treasure hunt, and planning the school dance, the intrepid heroes have more than enough on their cipher-loving minds. Though the plot stands alone, readers may need to revisit the first book in the series to catch up on necessary exposition. Without the weight of explanation, though, the story speeds satisfyingly along and is, all in all, a successful sequel. Includes supplementary back matter on geographical and historical references. VERDICT Readers who loved the first volume will find this follow-up even more satisfying. Purchase extra copies where there are fans.--Katya Schapiro, Brooklyn Public Library

Copyright 2017 School Library Journal, LLC Used with permission.

Bertman offers . . . a large, interesting cast of characters, plenty of challenges for code enthusiasts, and more complexity than most middle-grade mysteries. Young readers captivated by these distinctive characters will be hoping for the series to continue.