Left of Bang: How the Marine Corps' Combat Hunter Program Can Save Your Life, by Patrick Van Horne.
I finished reading this last week and took some time to digest all the material. Filled with invaluable lessons from the Marine Corps Combat Hunter Program, presenting several strategic ways or systems for making decisions under pressure and on less than permissive environments. This book will enhance the level of observation and awareness of your surroundings. It is an excellent text about decision making in any time-critical profession where safety and lives are on the line.
Learning how to read the environment and respond to it propery is sometimes the difference between coming out alive or not. The books does a great jon in talking about baseline body language, atmospherics and what is normal or not, and detection of anomalies. You begin to understand the importance of trying to think proactively and 2-3 steps ahead of a possible threat.
The material in the book is taken from the US Marine Corps Combat Hunter Program, which was implemented as a way to better prepare Marines for counterinsurgency environments like in Iraq and Afghanistan. In these environments the enemy hides among the civilians and blend it, coming out to attack and returning to being a "civilian". Book touches some of the best profiling methods, some use by Israel. Methods that anyone can apply to their daily lives and ennhace personal security.