Follow Sam, Egg, Gum, and Cat as they try to solve the mystery on their field trip to the carnival. The junior detectives are thrilled to go to a carnival: games, rides, funnel-cake--what could go wrong? Unfortunately, someone has stolen the electronic cards that serve as tickets and game-winning trackers, and the sleuths have to take the case to save their field trip fun. Readers will love being able to choose from 12 possible endings and following...