”While the rest of us who have written about the commission were only peeking
in, Howard P. Willens was there, a principal architect of the very history we could only write about. Now with his precise and very discerning pen, he has written with unimpeachable authority what actually happened, making his book a historically important one." — Vincent Bugliosi
It is your prerogative to distrust whoever you choose. Personally, I think Howard Willens’ book is one of the best sources we could have to help us understand how the WC worked.
When you say "...how the WC "worked", what does that mean? The staff did almost ALL the actual work, and the WC itself occasionally got together. The WC as a body NEVER even viewed the Zapruder Film as a moving picture. They ran away from the Z Film. How does a historical body such as this render a decision without EVER seeing the Zapruder Film start-to-finish?