A Million Little Fabrications

Another person featured in "Going Rogue" presents his side of the story. Money quote:

Why should anyone care about any of that? The reason they should care is that if Lynn Vincent aka Sarah Palin got as many of the facts, asserted and implied, about me in Going Rogue as wrong as she did, what does that say about the validity of the many other, much more important, “facts” in Sarah’s book?

Were any of the facts in this book checked? And who was the fact-checker at HarperCollins?