Book excerpt: "Learn, Earn, Return" is an e-book about a fascinating entrepreneurial journey. Organised by lessons and themes, the book aims to show the different aspects of being an entrepreneur. It was written and developed by Shirley Spence of Harvard Business School, and is based on the story of an accomplished global serial entrepreneur - Bert Twaalfhoven (BT). The Lessons; 1.Pursuing Opportunities: Getting in and getting out 2.Taking risks: Failing forward 3.Marshalling resources: The power of networking 4.Managing growth: Professional intrapreneuership 5.Giving back: easy, satisfying, and a responsibility Bert Twaalfhoven graduated from Fordham University, New York in 1952, and received his MBA at Harvard Business School in 1954. He started, through Indivers, 54 companies in 13 countries across the world. Most companies were successful, 16 ventures failed. BT was also co-founder of the first venture capital company in the Netherlands (Gilde) and has participations in several venture capital companies. In 1978 he received the "Koning Willem I" Award from Z.K.H. Prince Bernard. In addition to being an entrepreneur, BT is active in many capacities in international networks of universities and entrepreneurs, and the promotion of dynamic growth entrepreneurs. He is a co-founder of Europe's 500 and EFER.