If you could choose only one book from this list, Stephen R. Covey's The 8th Habit: From Effectiveness to Greatness should be the one. The best-selling author of The 7 Habits of Highly Effective People strikes a resonant chord with this characteristically well-researched and incredibly insightful guide. In The 7 Habits, published in 1989, Covey said career success was an attainable goal. He showed millions of people how to achieve effectiveness at work by changing their way of thinking. Now, Covey says, effectiveness is no longer enough. In the 21st century that's merely the price of entry to the playing field of well-compensated work. More often, workers want to add value to the world, to add fulfillment, passionate execution and significant contributions to their workplace and to the world at large. Tapping into the higher reaches of human genius and motivation requires a new leadership voice, Covey says, a new tool-set, a new habit. That's what this book is about: finding the passion to understand and develop an inner voice at work that gives meaning to work and life. The 8th Habit is a unique look at developing the lifelong talents of a leader.