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Beyond Numeracy by bestselling author John Allen Paulos is, according to the introduction, "in part a dictionary, in part a collection of short mathematical essays, and in part the ruminations of a numbers man." This book is genuinely different from other books on mathematics intended for a wide audience as the essay topics are indisputably diverse. (Titles include "Human Consciousness, Its Fractal Nature" and "Mathematics in Ethics.") Furthermore, Paulos's unique sense of humor and ability to intelligently editorialize are delightful--especially in a book on such a dry subject. [via]