Book excerpt: The new edition of a bestseller, this book is one of the leading educational resources for energy manager or energy professional as well as new people enter the field of energy management and energy engineering. It is the most widely used college and university textbook, as well as one of the most widely used books for professional development training. New topics include energy auditing, energy bills, life cycle costing, electrical distribution systems, boilers, steam distribution systems, control systems and computers, energy systems maintenance, insulation, compressed air, renewable energy sources and water management, distributed generation, and creating green buildings.