The Most Popular Free Nonfiction Entrepreneur Books of All Time

1. "Think and Grow Rich" by Napoleon Hill - This book, first published in 1937, provides a guide to achieving success through positive thinking and visualization. It has been widely popular among entrepreneurs and has been in continuous publication ever since.

2. "The 7 Habits of Highly Effective People" by Stephen Covey - This book, first published in 1989, provides a framework for achieving personal and professional success through effective habits and principles. It has been widely popular among entrepreneurs and business leaders.

3. "How to Win Friends and Influence People" by Dale Carnegie - This book, first published in 1936, provides a guide to building relationships and achieving success through effective communication and interpersonal skills. It has been widely popular among entrepreneurs and business leaders.

4. "The Power of Positive Thinking" by Norman Vincent Peale - This book, first published in 1952, provides a guide to developing a positive mindset and achieving success through the power of positive thinking. It has been widely popular among entrepreneurs and business leaders.

5. "The Lean Startup" by Eric Ries - This book, first published in 2011, provides a framework for developing and launching successful startups, emphasizing the importance of testing and iteration in the early stages of a business. It has been widely popular among entrepreneurs and startup founders.

6. "The 4-Hour Work Week" by Timothy Ferriss - This book, first published in 2007, provides a guide to achieving success through lifestyle design and time management. It has been widely popular among entrepreneurs and business leaders.

7. "The Power of Intentional Leadership" by John C. Maxwell - This book provides guidance for entrepreneurs looking to lead and inspire their teams, emphasizing the importance of clear vision, communication, and integrity. It has been widely popular among entrepreneurs and business leaders.

8. "The E-Myth Revisited" by Michael Gerber - This book explores the common misconceptions about starting a business and provides practical advice for building a successful enterprise, it was first published in 1995 and it has become a classic in the field of entrepreneurship.

9. "The Innovator's Dilemma" by Clayton Christensen - This book, first published in 1997, examines the challenges that companies face when introducing new technologies and products, and provides insights into how companies can successfully navigate these challenges.