Sheep No More: The Art of Awareness and Attack Survival
By Jonathan T. Gilliam
Former US Navy SEAL and FBI Special Agent Jonathan T. Gilliam brings his unique professional perspective to teach you the art of awareness and attack avoidance by sharing unconventional warfare techniques and how to think like an attacker.
While this book does not directly instruct one on how to prepare a layered defense, it does something very important. It explains the attack/defend planning mindset, how to look at your location as a target so you can identify the weaknesses you need to fortify.