This Gum for HirePaperback, 1 April 2003

Kidnapped! One by one, the members of Emerson Hicky's football team are disappearing. As far as Chet Gecko is concerned, this is a cause for celebration.
Only trouble is that Chet's old nemesis, Herman the Gila Monster, is the number one suspect, and he wants Chet to clear his (not quite) good name.
Chet and his mockingbird partner, Natalie Attired, must solve the case fast, or Herman will make sure it's their last. But which is more dangerous--Herman . . . or P.E. class?