Came here to post this. I cannot recommend this book highly enough. For one thing, the quality of the author’s research speaks for itself:

“The book is based on more than 50,000 documents, primarily from the archives of the CIA, and hundreds of interviews with CIA veterans, including ten Directors of Central Intelligence.”

https://en.wikipedia.org/wiki/Legacy_of_Ashes_(book)

you know this one is good because the cia denounced it. i started it earlier this week.