Amazon.com just posted my five star review of Intelligence: From Secrets to Policy, 4th Ed by Mark Lowenthall. From the review:
I was an Air Force military intelligence officer in the late 1990s. I've been working in computer security since then. I read Intelligence, 4th Ed (I4E) to determine if I could recommend this book to those who doubt or don't understand the US intelligence community (IC). I am very pleased to say that I4E is an excellent book for those with little to no intelligence experience. I also found I4E to be a great way to catch up on changes in the IC, particularly since Congress passed the Intelligence Reform and Terrorism Prevention Act of 2004 (IRTPA).
I4E is a great book -- check it out!