In this volume, leading scholars from North America, Europe and Asia come together to explore the topic of business models that takes the demand side (customers and their engagement) seriously. The first part deals with the model dimension of business models - what are they, how they are conceived, how are they manipulated, how they become iconic, how they are embedded in heuristics. These ideas are a new departure for the literature that allows more solid theorizing and progress. The second part deals with business models and change. It explores how the business model perspective increases our understanding of micro and macro change processes - in particular the critical question of how to achieve scale and scope, and the difference between social and other business models, how business models vary over the industry cycle and how different levels of management contribute to business model innovation.