If you are going to get your non-fiction book published, you will need to prepare a book proposal. Commercial book publishing is a business. A book proposal is a business plan. A good one will anticipate the questions an acquisition editor will be asking; questions like: What is the concept of the book? Who is the audience? What other competitive titles are there in the marketplace? Why do I have the authority to write about this subject? How will I promote it? Since you will be submitting your proposal to agents, we will also talk about writing good query letters.