The book author Brad Stone (who I used to work with) responded to Mackenzie's review and I think his comment is spot-on:
"I'm certainly less biased than Jeff's wife."
http://www.businessinsider.com/jeff-bezos-wife-reviews-book-...
"I'm certainly less biased than Jeff's wife."
http://www.businessinsider.com/jeff-bezos-wife-reviews-book-...
I quoted that line because I think it usefully reframes the conversation. Journalists certainly can be biased, but the good ones try very hard not to be. Spouses by definition are biased.
Stone's comment was defensively knocking over a strawman and I wonder if it is indicative of his overall seriousness as a writer.