When Cam Jansen and her friend Eric uncover a mystery while selling fudge door-to-door to raise money for the local library, Cam uses her photographic memory to foil a crime.
Jigsaw doesn't feel very thankful on Thanksgiving Day because his dog, Rags, is missing; and he and Mila won't stop until they solve the mystery of the dog's disappearance.
The solutions to ten mysteries solved by Leroy "Encyclopedia" Brown are given in a separate section challenging the reader to match wits with the ten-year-old mastermind of Idaville's war on crime.
Aiden and Meg Falconer must escape from a juvenile detention center in order to prove their parents innocent of charges which would put them in jail for life.