The book contains a series of brainteaser puzzles designed by some of Mensa's brightest minds to baffle, frustrate and mystify your mind. There are 20 different puzzle types providing both lateral thinking problems in the form of riddles and odd-one-out pattern spotting, as well as logic and math puzzles, such as Colour Square and Logic Sequence. As enjoyable as they are fiendish, these brainteasers will provide hours of entertainment.