I read this many years ago as a young man just getting to know what the world is about, and I have re-read it as a much older man, as a follow-on to reading the Jakarta Method and a precursor to reading The Killing Season, to re-acquaint myself with some of the details and backdrops to the Indonesian massacres.
The first time I read it I was amazed and somewhat shocked at what the CIA had been doing throughout Asian and Central and South America. The second reading left me feeling more disgusted than amazed/shocked. The author comes across as initially pretty naive about the world outside his own little corner, and was probably a bad fit for the job in the first place, but for all his purported Christian upbringing, he ends up being a pretty amoral character, never really thinking very hard about the larger picture of what his actions may be affecting. He is generally disgusted by living conditions in his overseas postings, never really gets to know or understand the people of a country beyond his professional contacts, and initially sees the world in an us-or-them point of view, and, like most of his contemporaries, seems driven by fear of Communists to the point where he adopts the "ends justifies the means" attitude towards his work, without ever really questioning what the ends are, until the very end, in a paragraph or two, where he wonders about the validity of his life's work.