Certain books that I have no use for seem to be popular with evangelicals, while other books that I value and love get almost completely ignored. The book "Who are you to Judge" is one of the best books I have read, yet it has so little reviews on amazon and is almost completely ignored by everyone whom I recommend it too. This is just one example, as I have dozens of books I love, yet are ignored by many. I know that writing ability does count a bit. Some authors get ignored because they are poor writers. I could nam a few names, but wont cause I may offend someone.