Chet Gecko loves a good mystery. Almost more than he loves stinkbug pie. So when fellow fourth grader Shirley Chameleon asks him to find her missing brother, Billy, Chet expects the case to be as easy as pie. But Billy's disappearance is part of a larger plot. If Chet doesn't solve the case fast, the entire school could be humiliated.

Used by permission of Houghton Mifflin Harcourt