This monograph provides a new perspective on business modeling in small and medium-sized enterprises (SMEs). It builds on the theoretical framework on innovation and revisits the Zahra and George (2002) model on absorptive capacity and other related works, such as the open innovation approach initiated by Chesbrough (2003). It also introduces a new 'open innovation bridge - a Tangram model' approach to business models that identifies the critical elements of the transactive structure of open innovation business models, especially, in the context of SMEs. The uniqueness of this book lies in the author's development of a gamification perspective and a tool to design open innovation business models.