In a sign of how fraught and politicized the conversation surrounding the book has become, Amazon limited reviews of “A Higher Loyalty” to Amazon customers who have purchased the book through the site, presumably to prevent trolls and cheerleaders who haven’t read the book from skewing the ratings. Normally, anyone can leave a review of a book without having to purchase it through Amazon. The filter suggests that Amazon noticed that people were flooding the site with political opinions rather than straight book reviews.
“This product currently has limitations on submitting reviews,” a message on the site says. “This may be because we detected unusual review behavior on this product.”