50 streng geheime tips voor detectives

How 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 gum? Find out with these strictly secret tips from the detective world! You'll learn to secure tracks, set traps for burglars, see through liars, and observe inconspicuously. And when you're off the case, you can train your powers of observation, develop unbreakable secret codes, and make your own detective equipment.