The Mammoth Book of Astounding Puzzles Welcome to the world of Eureka! With this bumper crop of conundrums, crosswords, and cryptic cubes, of labyrinths, palindromes, and problematic pyramids, puzzle fans can flex their mental muscle and test their intelligence half a thousand times and a multitude of mystifying ways. Throughout this brain-stretching if sometimes mind-boggling volume... more », numbers, symbols, diagrams, words, and geometrical figures are twisted by masters of mental trickery into top-grade challenges guaranteed to whet any puzzler's wits.« less