Books about Brain teasing from Amazon.com

Three dimensions turn these conundrums trickily mind-teasing, while lots of color helps make them even more eye-pleasing than ever. Here are eighty-six brain-baffling concepts both classic and tantalizingly new, inspired by the computer and graphic art. Pair off a series of coiled shapes by their length, a task made much harder by the fact that each coil is viewed from a different perspective. Play number games with a stack of dice: you'll see some of the dots, and get mathematic hints about the ones not shown to help you calculate the answer. Match some figures with their shadows. Thirteen salamanders crawl across the page in different directions: which two have the same pattern? These attractive puzzles pose a challenge you just can't refuse.

Don't just test your IQ; increase it. This immense collection of 600 visual, diagrammatic, letter, and number puzzles is a real brain-sharpener, designed to improve your performance as you work through it. Each of the 20 sections includes 30 questions that examine and focus on different abilities. They're all at approximately the same degree of difficulty, and you can only spend one hour per section. Pinpoint which of several images is the odd one out; discover number patterns; find which two words in a group have the opposite or the closest meanings. Wrestle with problems of logic, grapple with baffling sequences, and explore lateral thinking skills.

This is the perfect puzzle book for anyone looking for a challenge. But the real pleasure comes when you easily solve problems that once seemed downright impossible.