Trapdoor to Treachery — Kieran Fanning

This is no ordinary detective story! To help Sam and Lisa investigate a series of mysterious thefts, kids must crack codes, follow mazes, and unravel many other tricky situations that will jump them to different pages in the book.  
This interactive, nonlinear mystery recalls the popular Choose Your Own Adventure stories, but with many more illustrations and activities. As children read the exciting story and solve the puzzles, they'll discover clues to which pages to turn to next. Solutions included.