Philip Carter is a UK IQ test expert who is continually devising new IQ tests and puzzles. He has written over sixty books covering all aspects of puzzles, crosswords, testing, and reasoning skills. These include IQ and Psychometric Tests, IQ and Personality Tests, IQ and Aptitude Tests, Test Your IQ, Succeed at IQ Tests, Test and Assess Your IQ, The IQ & Psychometric Test Workbook and The Ultimate IQ Test Book, all published by Kogan Page.