Here is a link to a site that publishes a book that covers Bible doctrine from a point of view that is different from most mainstream churches. It explains how to prove if the Bible is true, what prophecy foretells for the United States in the years ahead, what the true gospel is, why the gospel needs to be preached to the public, and suggestions for preaching the gospel effectively. The book is free, can be read online or downloaded in .pdf format, and is in the public domain so you can copy it, quote from it, even republish it if you wish, and the author doesn't mind if you don't attribute the source. I know he doesn't mind because I am the author.
The name of the book is Preaching the Gospel