One Shot One Kill by Wm. Darrell Walker is a real-life, emotional, and honest book about a man's secret war in Vietnam. As a USAF T/Sgt serving as a Marine Scout Sniper under top-secret orders, Wm. Darrell Walker shares his powerful story of brotherhood, sacrifice, and survival. He was working secretly behind a government Non-Disclosure Agreement for nearly 50 years. He has written his war memories with violent truth and a lot of emotions that he used to feel for everyone around him. This is not a hero's story, but it's a soldier's bittersweet reality. This book pulls no punches and describes the pain, loss, and courage to win every war.