From the back cover:
Dpo you have what it takes to be a private investigator or secret agent? Let Mensa help you find out with the Covert Challenge.
Mensa's collection of Covert Puzzles is much, much more than an enthralling selection of mind-teasing puzzles. It's also a fully comprehensive test of the skills and abilities required for low-profile investigative work, whether as a private eye or a secret agent. Do you have what it take to succeed at covert operations.
Inside..., you'll find a broad selection of brain teasers to test puzzlers of every level of ability and every one exercises one or more of the skills required in covert investigations. There are observation puzzles, memory tests, codes and ciphers to crack, strategic problems, planning questions, manipulation trials, visualization riddles, cunning sequences, tests of nerve, and much, much more, all graded by difficulty and with full answers. Just as if you were on a secret mission, you'll never know what challenge faces you around the next turn.
The Mensa Covert Challenge is the ultimate test for everyone interested in intelligence - in both senses of the word.