It's amazing how history works. Waller covers the history of the CIA through the stories of four of the men who ran it; Allen Dulles, Bill Casey, Bill Colby and Richard Helms. All were proteges of the founder, Wild Bill Donovan. All had their good points, and their faults. Waller explains the early stages of the men's careers, through their leadership, and after they left the agency. The author presents a thorough, very fair, seemingly unbiased, examination of each man.
If you read this, you cannot help but come away with a better understanding of why history has played itself out the way that it has.
I highly recommend this book.