The Kosmos crime puzzle «The Three Investigators – The Villa of Riddles» combines puzzle fun with a detective mystery case. The game comprises 300 pieces and depicts a mysterious estate with a winding staircase and stone gargoyles. The set includes an exciting short story about the investigators Justus, Peter, and Bob. After reading the story and assembling the picture, the actual investigation work begins: the finished puzzle glows in the dark and conceals secret clues. With the help of the included UV lamp, you make invisible traces visible to solve the mysterious case. The detective puzzle demands deductive skills and attention to detail when solving riddles together or independently.