How smart are you? Find out with these 300 quizzes from one of the world's most-renowned creators of mind-bending conundrums. Pierre Berloquin organizes his mini puzzles into series, with each group testing a particular mental process. He then presents five lengthy tests that cover everything from letter logic and pattern recognition to fluid intelligence and graphic combinations. If you're curious to know how you stack up in terms of IQ, you'll absolutely want this!