Test yourself against a fiendishly tricky series of IQ test-style puzzles, the perfect training for those who want to prepare for a Mensa IQ test.

This full-colour puzzle book features a wide variety of questions to test every aspect of your brain's workings, from visual and spatial challenges to pattern-based or logical problems. Compiled by Dr Gareth Moore, Mensa's Most Difficult IQ Puzzles will force you to think in new ways and spot patterns you have never seen before in order to solve these demanding conundrums.

Dr Gareth Moore is the author of over 250 bestselling international puzzle and brain-training titles from a wide range of publishers. His books are available in over 40 countries, with worldwide sales of over 5 million copies. His puzzles also appear in magazines and newspapers, and can be played online at the PuzzleMix website. He is also the creator of Brained Up, a cutting-edge brain training site that offers daily sessions to help you make the most of your brain, and is a director of the UK Puzzle Association as well as a former board member of the World Puzzle Federation. He works with a co-writer, Laura Jayne Ayres, on his murder mystery-themed puzzle books.