Yeah he’s pretty good...always liked Kessler..
If this is the same Kessler, his 2 books I read were very objective, but still full of interesting information (not boring). He wrote a pretty good book about the CIA; it’s a good primer for anyone interested in how the Agency is set up and includes some good stories from the Cold War. Of course, some info. it a little outdated, such as DO is now the “National Clandestine Service”, whatever, in my mind it will always be DO. And the DCI is now the DCIA, due to the fact there is now DNI.