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. . . .

Chet Gecko loves a good mystery. 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...

Someone is turning the students at Emerson Hickey Elementary into zombies, and it's up to fourth-grade private eye Chet Gecko to find out who.

When hired by a fellow fourth-grader to find her missing brother, Chet Gecko uncovers a plot involving a Gila monster's revenge upon the school football team.

Chet and his partner, Natalie Attired, take on a case involving an actor gone missing from the school musical.

Chet Gecko is hired by Principal Zero to investigate the disappearance of valuable items from Emerson Hicky Elementary--including Mama Gecko's pearls.