The school janitor knows more than he's willing to say, so it's up to Max, Liz, and Chen to figure out what's got him so on edge in Book 6 of the Code Breakers series. This decodable chapter book lets upper elementary readers build fluency with R-controlled vowels and diphthongs while unraveling this page-turning mystery..
"This series offers a fun and engaging introduction to code-breaking while weaving in a clever mystery...A solid secondary purchase for large libraries that code breakers will enjoy."
