Assassin: The True Story of One of America's Most Successful Assassins. Robert J. Firth

This is a factual, no-nonsense book as told by a professional American assassin. The stories he tells are descriptions of true events with only a few names changed for obvious reasons. The author pulls no punches and never softens the story to make it more palatable. What you will read describes accurately the preparation, dedication, training and mind-set of a man and his associates who kill America's enemies for a living.