Many nonfiction books contain factual errors, flawed conclusions, or both.
Many book reviews fail to point out those shortcomings. In combination, a flawed book and a naive review mean readers are ill-served. I am among the guilty reviewers. During 1999, I gave glowing reviews to two nonfiction books that I have since learned are more flawed, perhaps significantly, in ways I had not realized. In previous years, I have been guilty, too.