Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Certified Protection Specialist

If you want learn how to deal with a hostage situation, this is the wrong book. If you are new to the industry or a manager in charge of training new officers this book will do a good job of covering the basics. I recomend this book to all new officers I encounter. There are other books that deal with different subjects of security indepth, but this is the one that opens the door of knowledge and paves the way for further studying.