I read this book because I was intrigued to learn about a former CIA agent who resigned from the Agency in 1968 and went on to make a life for himself in Cuba.
Agee, a Roman Catholic and graduate of the University of Notre Dame, was recruited into the CIA in 1957, seeing himself as part of the great crusade against world Communism. He goes to some length to detail his experiences in Washington, Equador, Uruguay, and Mexico -- in addition to disclosing some of the CIA's espionage practices. Eventually, Agee becomes disenchanted with his work. Whether or not his post-CIA activities make him a turncoat or truth-teller I leave to the reader to determine. For me, this was one of the best books about the CIA that I've yet read.