These are think-out-of-the-box brainbusters, lots of fun for anyone who enjoys a challenge. Some of the situations presented may seem really strange, and almost impossible to solve, but once the obvious assumptions are discarded, the answers begin to come into focus. The key lies in being creative, and getting into the groove by trying the easier puzzles before moving on to the super-hard ones. The collection includes problems that use visual clues, timed questions, and thorny conundrums that ask you to look for sequences, uncover relationships, use deductive reasoning, and make clever observations. It’s a true test of anyone's smarts.