In this fabulous new collection of fast and fun puzzles, Nathan Haselbauer sets out to satisfy that most basic of puzzling cravings - the buzz of reaching the solution quickly. Here is the perfect book for anyone who has ever felt the thrill of being on a roll.

The Mammoth Book of Fast Puzzles contains over 400 all-new original brainteasers, ranging from easy maths and logic problems, to word games, sudoku, mazes and illusions, with the emphasis on clarity of presentation and simplicity of answer.

The puzzles range from very easy to only moderately challenging, and are all capable of being solved in an equally short time. Put together, they form an addictive collection.


So you think youre a genius? This brilliant new collection of tantalizing puzzles and top-grade problems by the founder of the International High IQ Society will puzzle your mind with extreme mental exercise. Over 300 original puzzles from graphic conundrums to logic puzzles and word teasers cover a broad range of difficulty.

Nathan Haselbauer, President of the International High IQ Society, has painstakingly researched and designed this impressively varied collection of over 500 mind-bending puzzles to enable you to determine just how clever you are.

This huge variety of maths, logic and word puzzles ranges from reasonably straightforward to fiendishly difficult. Each puzzle is clearly presented, though, and its solution is perfectly clear. In theory, each puzzle can be solved - in your head - in just a few minutes.

Fully endorsed by the International High IQ Society, the fastest growing high IQ society in the world, this book represents the gold standard of IQ testing.

Praise for Nathan Haselbauer:

'The young New Yorker who's challenging the Old Guard of the IQ World' Observer


The Mammoth Book of Sudoku

by Nathan Haselbauer

Published 8 September 2005
Here is the biggest and most varied book of Sudoku puzzles ever compiled. Over 400 painstakingly prepared puzzles designed to satisfy all levels from beginner to expert. "The Mammoth Book of Sudoku" contains more challenges, more levels of difficulty, and more varieties of number-placement (and letter-placement) puzzles than any other collection available, including: huge array of easy to diabolically-difficult classic grids; monster Sudoku - multiple overlapping grids; secretly encoded alphabetical wordoku; liquid crystal Sudoku; and bonus kakro puzzles. It also contains full step-by-step instructions, tips and killer strategies from the founder of the International High IQ Society and confirmed Sudoku addict, Nathan Haselbauer.