Are you ready to solve unsolved mysteries? If you are fascinated by secret investigations and dark cases, the world of detectives awaits you! In this ultimate guide, you will learn about the necessary equipment that accompanies every special investigator, about their disguises, and about the way they interrogate suspects, collect evidence, and take fingerprints... You will meet famous detectives from crime literature and have fun with various games, tests, secret codes, and activities that will help you become the smartest detectives of all time!