John F. Macarthur Jr. said this quote
“ Look in your local Christian Bookstore. You could take most of the books there, throw them into the sea, and not lose anything valuable. The vast majority of them are just placebos that superficially attack trivial problems. During the eras when the church was most holy, Christians had very few books to read, but the ones they did have told them how to have a relationship with God. Most books today don't do that. ”