David Allen as just released his new book Making It All Work: Winning at the Game of Work and Business of Life, following the success of Getting Things Done and Ready for Anything. His new book Making It All Work pulls all his thoughts together in a very organized way. This book is much easier to read and implement and has many new tools. I recommend it highly.
John Bogle the founder of Vanguard Funds has written another important book. Enough: True Measures of Money, Business, and Life is a must read.