Book excerpt: Physical Security 150 Things You Should Know is a comprehensive reference for the security professional. This book covers all aspects of security operations, from lighting and fencing to tracking systems and crime risk management. The "150 Things" offered by Tyska and Fennelly will help professionals in the field build a well-trained, alert, and conscientious security staff. Format is unique in that it identifies subjects, then discusses and highlights specifics in terms of concerns and knowledge the security professional requires Quick and easy reference Covers basics of physical security - both high and low tech