Crime prevention through environmental design (CPTED) is not a new concept. The phrase was coined by C. Ray Jeffery in 1971, but a significant contributor to the concept of CPTED was renowned criminologist Timothy D. Crowe, a legend in the security industry. His book, Crime Prevention Through Environmental Design (1991), is a primary resource for crime-prevention practitioners in the security industry to help them better understand the relationship between design and human behavior. CPTED is not a reactive discipline. Rather, it is a proactive approach to manipulate the physical environment and bring about the desired behavior of reduced criminal activity as well as reduced fear of crime. While director of the National Crime Prevention Institute, Tim Crowe began the CPTED Training program in Louisville, Kentucky, where thousands of crime-prevention practitioners, law enforcement officers, and security professionals still proudly say that they attended classes. This updated edition of Tim Crowe’s book is a CPTED milestone, both nationally and internationally, and is long overdue. It was imperative that the second edition of Crowe’s book be written by someone with the experience level that is gained only by years of working as a security professional. Larry Fennelly understands what being proactive truly means. This edition discusses how to reduce criminal opportunity and reduce risk. This is the essence of what crime prevention is about.