50 streng geheime tips voor detectives kaartspelHow do you track down scammers and shake off pursuers? How do you get witnesses to talk? And why do detectives have to nibble nuts and always carry chewing gum with them? Find out with these top secret tips from the detective world! You learn to secure traces, set traps for burglars, see through liars and observe unobtrusively. And if you don't have a case, you can train your observation skills, develop unbreakable secret codes and make your own