This excellent autobiography covers the emotional life of a thoughtful man. Emanuel Derman examines his conscience dispassionately and honestly, offering a sometimes poignant account of his descent from the world of pure science to the hustle of Wall Street. His memoir flows like a conversation, albeit with many tangents. You’ll learn more than you want about personnel changes at his former firms, but you’ll also gain rare insights into how Wall Street makes decisions, plus a few excellent points about the inadequacy of financial theory as science. Derman’s descriptions of options theory and financial models sometimes approach clarity, but may be far beyond the lay reader’s understanding. We recommend this book to avid students of Wall Street and to any academic contemplating a move there. General readers who would enjoy Derman’s reminiscences, and who do not mind tackling some dense scientific and financial material, will find an in-depth life story with moving reflections on the disparity between youthful ideals and mature compromises.