The General Theory of Employment, Interest and Money

I can think of no single book that has so changed the conception held by economists as to the working of the capitalist system as The General Theory. -- Robert Heilbroner
The General Theory is nothing less than an epic journey out of intellectual darkness. That, as much as its continuing relevance to economic policy, is what makes it a book for the ages. Read it, and marvel. -- Paul Krugman
The General Theory combined towering intellectual achievement with immediate practical relevance to a global economic crisis. There has been nothing like Keynes's achievement in the annals of social science. -- Paul Krugman
Over the past 70 years The General Theory has shaped the views even of those who haven't heard of it, or who believe they disagree with it. -- Paul Krugman
Keynes's magnum opus of 1936 completely recast macro-economic thinking about government policy. -- Tony Judt
Economists may have forgotten The General Theory and moved on, but economics has not outgrown it, or the informal mode of argument that it exemplifies, which can illuminate nooks and crannies that are closed to mathematics. Keynes's masterpiece is many things, but "outdated" it is not." -- Richard Posner
The General Theory was a work of genius. -- Paul Samuelson
The General Theory of Employment, Interest and Money is a work of enduring fascination. It is simple and subtle, obscure and profound. -- Robert Skidelsky (Keynes’ biographer)
The General Theory broke in on the established structure of economic thought, as it was termed, with a glass-shattering effect. -- John Kenneth Galbraith
The General Theory struck off the shackles of laissez-faire ideology. Keynes knew that new freedom would raise fresh problems and require fresh solutions. -- Joan Robinson