In this entertaining and challenging collection of logic puzzles, Raymond Smullyan-author of Forever Undecided-continues to delight and astonish us with his gift for making available, in the thoroughly pleasurable form of puzzles, some of the most important mathematical thinking of our time.

• Part I - Logic Puzzles


• 1: The Prize and Other Puzzles


• 2: The Absentminded Logician


• 3: The Barber of Seville


• 4: The Mystery of the Photograph


• Part II - Knights, Knaves, and the Fountain of Youth


• 5: Some Unusual Knights and Knaves


• 6: Day-Knights and Night Knights


• 7: Gods, Demons, and Mortals


• 8: In Search of the Fountain of Youth


• Part III - To Mock a Mockingbird


• 9: To Mock a Mockingbird


• 10: s There a Sage Bird


• 11: Birds Galore


• 12: Mockingbirds, Warblers, and Starlings


• 13: A Gallery of Sage Birds


• Part IV - Singing Birds


• 14: Curry's Lively Bird Forest


• 15: Russell's Forrest


• 16: The Forest Without a Name


• 17: Godel's Forest


• Part V - The Master Forest


• 18: The Master Forest


• 19: Aristocratic Birds


• 20: Craig's Discovery


• Part VI - The Grand Question


• 21: The Fixed Point Principle


• 22: A Glimpse into Infinity


• 23: Logical Birds


• 24: Birds That Can Do Arithmetic


• 25: Is There an Ideal Bird


• Epilogue


• Who's Who Among the Birds

Raymond Smullyan, a well-known mathematician and logician and the author of many books, is Oscar Ewing Professor of Philosophy at Indiana University and Professor Emeritus of the City University of New York-Lehman College and Graduate Center.