Who Knows?: A Study of Religious Consciousness

The Gödelian Puzzle Book: Puzzles, Paradoxes and Proofs

To Mock a Mocking Bird

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A Beginner's Guide to Mathematical Logic

The Riddle of Scheherazade: And Other Amazing Puzzles, Ancient and Modern

Reflections: The Magic, Music And Mathematics Of Raymond Smullyan

Satan, Cantor, And Infinity And Other Mind-bogglin

Logical Labyrinths

A Beginner's Further Guide To Mathematical Logic

The Magic Garden Of George B And Other Logic Puzzles

Four Lives: A Celebration of Raymond Smullyan