Friend's Email: Subject:I have found a book that I think you would enjoy
The Lady or the Tiger?, Forever Undecided
The Lady or the Tiger Forever Undecided Author:Raymond Smullyan Two books of recreational logic and math problems by mathematician and logician Raymond Smullyan. The puzzles range from the simplest "old chestnuts" to bhe most tantalizing complexities. They are a delight for puzzle fans of every age and ability, from the high school whiz to the seasoned mathematician, logician, or computer scientist.