Gerry Campbell is a serial entrepreneur, investor and adviser (bio). He’s also a good friend. Gerry has just published a new book, Demand Horizon: A Revolutionary Approach to Creating Great Products. The book introduces a new mental model for understanding and adapting to the demand-driven economy. It’s a framework for making sense of the new rules in product creation, offering both strategic understanding and practical actions for adapting to the new rules of business. Demand Horizon shines a light on…