Journey through Genius: The Great Theorems of Mathematics, by William Dunham. ISBN 014014739X. Penguin, 1991. This book is a wonderful mix of proofs and history. The proofs are interesting (and showed me how rusty I am on some of this), but the history really brings it alive, providing a context to show why mathematicians care. I was left with an even greater appreciation for how Euclid, Newton, and Euler really stand high above so many others. (Reviewed August, ’06)