■

• William Byers, How Mathematicians Think: Using Ambiguity, Contradiction, and Paradox to Create Mathematics, Princeton University Press, $35.
• David Weissman, The Cage; Must, Should, and Ought from Is, State University of New York Press, $24.95.
• Saul Smilansky, 10 Moral Paradoxes, Blackwell, €9.99.