Chet Gecko, Private Eye, Book 1: The Chameleon Wore Chartreuse

Chet Gecko has always loved a good mystery. Like how do you squeeze ketchup into those little plastic packets? And, who put the boom in Shaka-laka-boom-boom?
If there is a mystery to be solved, Chet's the one to do it. Who is he? Chet Gecko - Private Eye, the lizard from the fourth grade at Emerson Hickey Elementary.