I'd suggest either Adam Smith's "The Wealth of Nations" http://en.wikipedia.org/wiki/The_Wealth_of_Nations http://en.wikipedia.org/wiki/The_Wealth_of_Nations

I'd suggest either Adam Smith's "The Wealth of Nations" http://en.wikipedia.org/wiki/The_Wealth_of_Nations http://en.wikipedia.org/wiki/The_Wealth_of_Nations Or Karl Marx's "The Communist Manifesto". http://en.wikipedia.org/wiki/Communist_Manifesto http://en.wikipedia.org/wiki/Communist_Manifesto Both books have ideas which helped to bootstrap economic revolutions whose effects are felt to this day. But in seriousness, I don't think there is one best book. But reading a bunch of books by/about very successful people, such as (but not limiting to) Bill Gates, Lee Iacocca, Oprah Winfrey, and Warren Buffett will help you gain insights and different perspectives. What I see is that the most successful people are well rounded. They have the ability to approach problems from many different angles. Entrepreneurship is so much about personal interactions. One book which really helped me in learning to get along with people is Dale Carnegie's "How to Win Friends and Influence People."