This book features a series of 10 detective cases to work through--cracking codes, solving mazes, figuring out logic puzzles, and more along the way. The reader plays the part of the private investigator at the center of the action, tracking down a stolen artifact, figuring out who hacked the mayor's computer network, and solving a haunted house mystery. Other cases include figuring out who has stolen an inventor's prized robot, catching a dognapper, a fairground mystery, an undercover mission, and a tropical island case. The 192-page book is fully illustrated in a light, humorous style, with 87 puzzles in all.