The book which, while preceding the movie, was apparently written because of it. Again, the irritation is that it focuses on the authors' part of the story, and suddenly stops when things get really weird (p331, five pages to go):
On Saturday the 14th, Woodward received a phone call at home from a senior memeber of the [Senate] committee's investigative staff. "Congratulations," he said. "We interviewed Butterfield. He told the whole story."
What whole story?
"Nixon bugged himself."
I would have preferred the narrative to be situated in history a bit better, such as by clueing us into other events in the U.S. by providing some correlative newspaper headlines.