Intellectual excursions into the thinking process that lies ""beyond language,"" these puzzles are the last word in tests for the mentally dexterous. In fact, the persistent can spend a pleasant year in figuring out such problems as how to prove America has 50 states simply by using the letters--A-M-E-R-I-C-A, or what and where is DRUK-YUL. Along the way you will pick up such heady trivia as: BA BA BA BA is a sentence in Chinese Aunam which properly pronounced means ""Three ladies gave a box on the ear to the favorite of the prince."" There are ""hints"" (usually needed) for the various word games which encompass literature, geography, history, science and mathematics among other subjects. Unique, challenging, these ""adventures in the realm of pure thought"" should tantalize, mesmerize.