Keynes and the Market: How the World's Greatest Economist Overturned Conventional Wisdom and made a Fortune on the Stock Market - by Justin Walsh
Another long titled book (apparently I am prone to those). This book was rather short and did not go into a great deal of detail on any particular point. Additionally, since it was written well after Keynes died, it is heavily influenced by other, later value investors, notably Buffett. On the other hand, it has a great number of wonderful investing quotes/philosophies and does a good job of chronicling the conversion of Keynes from a momentum investor (e.g., in currencies after World War I and in stocks during the 1920's bubble) to a value investor in the Great Depression.
Overall, it provides a decent primer on the investment philosophy and success of Keynes, with some commentary on the rest of his life. For those seeking more specific details on any particular subject on Keynes, however, a different book should probably be sought.