Book excerpt: Namaste! There's nothing better than these soul-satisfying brain bafflers for staying mentally supple and fit. Exercising the mind is as important as training the body, and this challenging mental workout will do the trick. It takes real cerebral power to unlock the secrets of these artfully crafted conundrums, which deal with everything from math and language to chess strategies and logic dilemmas. Find number and letter patterns, solve spatial problems, decipher devious anagrams, and much more. They may seem impossible--but solvers who stay fully engaged and focused will find success!