From Booz& Co.: Every enterprise has an informal as well as a formal organization. The formal is the side with which business people are usually most familiar. It consists of analyses, strategies, structures, processes and programs — all codified in memos, charts and power-point presentations. These tools are designed to align decisions and actions. The informal is generally less familiar. It consists of emerging ideas, social networks, working norms, values, peer relationships and communities of common interest — the elements that often hide beyond the boundaries of the formal. In “Leading Outside the Lines”, authors Jon Katzenbach and Zia Khan make the compelling case that it is in the less familiar informal world where magic happens — yet one without the other is unlikely to sustain peak performance over time.