Tell that to Bill Casey's family.
Tell that to Hillary Clinton's friend, Ms. Sherburne.
The guy went for getting to the bottom of the story, justified in my opinion in this case. I am unaware of any of his writings that can be characterized as disingenuous. Perhaps there are, I am just not aware of them. He wrote a very complementary book of the Bush administration in its planning stages for the Iraq war. But then, Woodward does tend to have an establishment bias when it comes to the Executive's exercise of foreign policy initiatives.