A Game of Chase: Diary of a 6th Grade Ninja Book 4

Continuing the havoc-meets-hilarious adventures of Chase Cooper, who is recruited by a secret society of ninjas at his new school.
Rival ninja clans, pirate overlords and now a sneaky evil genius - at my school, things don't stay quiet for long... The science fair is coming up, and things are going smoothly - until some supervillain starts stealing science projects and destroying them. Oh, and leaving me anonymous notes and trying to frame me. It's going to be a long week.

My name is Chase Cooper, and I'm a 6th grade ninja.