Perhaps you are preacher who is already aware of the importance of writing books, but are hesitant to proceed because this is unchartered territory.
If that is the case, do not worry. Your fears are not without basis; after all, they say that publishing is similar to opening a new business. It takes money, effort, time, and a certain amount of understanding in order to be successful. But here is one thing that you should know, being a Christian writer you already have the upper hand on all other books that will be published. You already have a huge target market and a particular niche where your book will be well received and bought.
The only thing you have to worry about then is writing your message effectively and marketing it well. Their work should not be merely relegated to preaching during services or offering counseling and training, but should extend to a wider and more timeless approach of putting their message on paper and preserving it for posterity. With such an important role, Christian books selling is a ministry in itself that preachers should be involved in as part of the Great Commission.