There are authors of Christian books who promote heresies. They compromise doctrine, introduce heathen practices, and often weave their seductions into innovative works of fiction. How can you know that a book is really written from a Christian viewpoint? There are at least three qualifications that readers can put on their rubric to assess books by, and there is also a short list of authors to avoid that a reader can have handy when they go shopping in Christian book stores. For your copy see “Dangers In Christian Book Stores,” by David Cloud.
Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them. (Rom 16:17)