While this is a short book in terms of total pages, it still does a good job of covering the subject of OC/Pepper Sprays. Persons looking for information on other forms of incapacitating gasses, sprays will not find that coverage here. The book is a bit dated but the basic blocks of what is and makes Pepper sprays, is still relevent. A good overview of the entire subject is presented. The basics of what, and how are covered, along with scattered photos - also a bit dated. There is no history of the product or it's development. The book is focused more on how to pick one for effectiveness and how to use them. Subjects that most readers would want to know. Of course some newer products are currently on the market but that does not really detract from this book. I liked it and felt it actually added some to my Law Enforcement Pepper Spray training that I have had. Rate it at perhaps a two night read.