The Entrepreneur's Playbook : More Than 100 Proven Strategies, Tips, and Techniques To Build A Radically Successful Business Leonard C. Green Paul B. Brown text USA : Amacom, 2017 eng contents: 1 find a marketplace challenge tha needs to be solved or improved 2. a better mousetrap is not enough 3. if you ain't passionate about your idea, No one else will be 4. experiment etc Entrepreneurs URN:ISBN:978-0-8144-3817-6