Chet Gecko loves a good mystery.
Almost more than he loves his fee--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 a pie.
But Billy's disappearance is part of a larger plot, one that involves the Rat Sisters, a riddling junkyard dog, and a vicious Gila monster named Herman.
If Chet doesn't solve the case fast, the entire school could be humiliated.
Worst of all, Chet might not get his fee.
And Chet's hungry.
