Many people and IQ puzzles fascinating but are nevertheless bewildered by them. Why should one particular shape be the odd one out? Why should a certain number be the next one in sequence? Philip Carter and Ken Russell - the UK Mensa Magazine puzzle editors - are the world's leading composers of IQ puzzles and are thus uniquely qualified to explain the mental techniques required to solve these conundrums. This book also features almost 1000 IQ puzzles so that the keen reader can put their newfound skills to the test.