The Design of Business: Why design thinking is the next competitive advantage, by Roger Martin was a positive surprise as it was a quick read, well structured, delivered several interesting concepts and some in depth cases on design thinking and business model innovation. Even though several of the cases are familiar for many readers (such as P&G, Apple, Cirque du Soleil, McDonalds and RIM) Roger, who is dean of the Rotman School of Management at the University of Toronto, professor of strategic management, and author of the book The Opposable Mind, adds interesting perspectives and sometimes information from behind the scenes working as a consultant and advisor. The book is an extension of Roger's popular article (free download) from 2004 with the same name. The book in three bullet points: * It introduces and explores the concept of the "Knowledge Funnel" describing how knowledge advances from mystery to heuristic, to algorithm for businesses to gain efficiency and lower costs, and the activities of moving across the knowledge stages (exploration) and operating within each knowledge stage (exploitation).