At first glance, the book's most impressive attribute is the large number of documents which are reproduced (a picture's worth a thousand words, I guess). But then one find's one's self getting caught up in the explanatory narrative, and the documents shift into their proper background or ullustrational focus. And then there's the notes, hundreds of them, each brimming with detailed explanations of particular points, citations, suggested readings.
There's just no end to it. If one were to be allowed only one book on the FBI, this would definitiely be it!
Any chance the authors will be updating it any time soon?