N.-Y.: Penguin Books, 2004. - 110p.
Mindstretch invites you to put your skills of problem-solving, deduction, logic and lateral-thinking to the test without being attacked by lemmas, construction, induction and sundry other mathematical demons. And interspersed with curious facts about numbers, are magic squares, riddles on chess, a special crossword and a fascinating section showing you how to draw your own maze.