May We Suggest? This post contains recommendations from a CPL librarian. To get your own customized recommendation, just fill out the May We Suggest form — you can expect results within 10 days. All suggestions can be found on the May We Suggest blog or by liking May We Suggest on facebook.

Secret Codes & Ciphers: Can You Solve It?

The black book of buried secrets by [written by Mallory Kass] ; introduction by Rick Riordan

Sly the sleuth and the code mysteries by Donna Jo Napoli and Robert Furrow ; illustrated by Heather Maione

Secrets of Greymoor by Clara Gillow Clark

The spotted dog last seen by Jessica Scott Kerrin

Wild Fibonacci: nature's secret code revealed by Joy N. Hulme ; illustrations by Carol Schwartz

Super little giant book of secret codes by David Lambert & The Diagram Group

Navajo code talkers by Andrew Santella