"I would certainly suggest that the wording be altered that references his ""bestselling author"" status, since as a non-US citizen I hadn't even heard of him before I started researching Mormonism to a deep degree.  I feel it's quite ""weasel-wordy"" to say that he's an American author and then say separately that he's a ""bestselling author"" because the way that is done implies he's a bestselling international author, which clearly isn't the case judging by the fact that Amazon.com rank his book #25 out of 100 in the category ""Mormonism: Controversial"" and only in the late 617000's as an overall sales rank.    

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