Here is a book that manages, in relatively few pages and in a style that is consistently readable, to address provacatively and intelligently some of the central questions that men and women throughout time have pondered. Three basic areas are covered: (1) The existence of God, and more important, the "type" of God in whom one believes, (2) The question of whether God is unable or unwilling to grant eternal salvation to all and, (3) Whether we are evolving toward a higher level of consciousness -- a state of being "better described than defined." Smullyan, apparently, has led a colorful life, a significant fraction of which has been spent outside the halls of academia. Still,he is best known for his puzzles, particularly his wonderful puzzles concerning Knights (who always speak the truth) and Knaves (who never do). So, we are most fortunate that this magician/logician should turn his attention to the greatest puzzles of all: Does God exist, what are God's attributes and can we, or at least some people, know God? Countless volumes have been written on these questions. I have sampled not even an insignificant fraction of such work, but I'd bet good money that you could travel a long way in those jungles before finding a book as lucid and as accessible as "Who Knows?" One doesn't have to agree with Smullyan to go on the tour with him. Having read the library's copy, I purchased my own copy from Amazon and plan to take the trip again shortly.