Laurie Usewicz, Vice President, Americas, Channel Sales, Bluecoat
"The 7 Habits of Highly Effective People", by Stephen Covey. This book, from a business perspective, articulates the mind-set required of a successful entrepreneur. Also, "Innovation and Entrepreneurship" by Peter Drucker. A classic on the subject of entrepreneurship with a clear distinction between economic activity (your average business) and the game changers (entrepreneurial organizations).