That is the new Keynes biography by the renowned Richard Davenport-Hines. It’s not like most biographies I know. The font is fairly large, and the presentation is non-comprehensive and fairly subjective. It is more like reading the transcript of some very good talks on Keynes, and less of a trudge than many bios. There is even a chapter on Keynes as lover, but actually quite serious and good, as it helps set the man in context. For Davenport-Hines, Keynes was most of all a Cambridge Apostle. This book will help you get inside the mind of Keynes, definitely recommended.