The Mystery of Mr. Nice — Bruce Hale

Art and Crime Don't Mix (not even with water). Just Ask Chet Gecko.

Chet Gecko's got the heart of an artist. He just doesn't have the talent.

His classroom portraits get him an art show in the principal's office -- and face-to-face with a mystery right out of his nightmares: Principal Zero is nice to him.

Now that's creepy.

Worse, Zero is in cahoots with a pack of new teachers who are as crooked as the Mona Lisa's smile. They're up to something sinister, and only Chet and Natalie Attired, his mockingbird partner, can snoop out what's going on ... and save the entire school!