Several years ago I worked for an organization that, among other things, investigated certain types of unauthorized disclosures/leaks of classified information. One of the tasks I was most daunted by was trying to investigate disclosures in various books. I thought, and said as much, that it must be impossible to find the sources for all the classified material in Naylor, Bowden, and other journalistic vice memoir style books with all their research, careful cover by the author, and the wide variety of non-classified sources. A veteran investigator told me something that proved very true - 'Nope, it's the easiest thing in the world. Read the book a second time and look for the unsung 'heroes' - the guys that according to the narrative always knew the right answer, were prescient about how things should have been done, and never seemed to be recognized fully. Nine times out of ten we look at those one or two guys hard, and they've got dozens of direct connections to the author.'
Makes me take the press releases and commentary with a grain of salt.