:It's simply common sense to not base an article about any book mainly on the book itself. It's absolutely essential not to base articles on extremely controversial books on those books themselves. One can use one's own good judgment in deciding which secondary sources are the most important - those written by the most famous and prestigious authors, those published in the most widely respected journals, etc. Take the trouble to find such sources and use them - basing it all on primary sources just because you happen to have read the primary source in this case is lazy, frankly.