- Fiction
- codebreaking
- cracking codes
- detectives
- mysteries
- puzzles
- secret codes
- Connect Your Summer
- May We Suggest
- Mystery
May 31, 2015 | lovetta
Destroy after reading: the world of secret codes by Mary Colson
The black book of buried secrets by [written by Mallory Kass] ; introduction by Rick Riordan
Betrayed! 1977: the journal of Zeke Moorie by Bill Doyle
The secret of the skeleton key by Penny Warner
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