R obert Caro’s The Power Broker may be the most-read 1,000-page-plus non-fiction book in recent memory. It is studied by city planners, developers, government officials, activists, and informed citizens everywhere. Published in 1974 on the eve of New York’s near-bankruptcy and reflecting new ideas about what makes a livable city, the book squarely blamed New York redevelopment czar Robert Moses for the Big Apple’s despair (hence its subtitle: "Robert Moses and the Fall of New York"). And because Moses was the dominant city builder of the era–not only in New York, but nationally–Caro’s compelling narrative spoke to the nationwide worry about urban decline. Today, New York is booming, and, unsurprisingly, Caro’s harsh assessment of Moses’s legacy is under attack.