I have completed a book about creativity. I know I need an agent since this is not the only book I want to write. Now that I am in rewrite, I thought of you. Whatever thoughts or suggestions you might have, I would gratefully appreciate.--Warren
I went to your website. My very quick analysis: Your topic is sellable, you have good credentials and the potential for building a solid platform. If you're planning or holding workshops already, that's even better. These are all things an agent or publisher would look for. However, for a nonfiction book, you must have a proposal to send an agent or publisher. No exceptions (unless you are a celebrity or have successful past publishing experience).
Since you are in the revision stage of your manuscript, it seems to me that it's the perfect time to focus on your book proposal. This way you can make any necessary adjustments to the book before the manuscript is finalized.
The proposal will help you answer the questions agents and publishers want to know: What's your book about? How is it different from others on the market? Who will read/buy your book? Why are you the right person to write this book? What are you going to do to promote the book? What additional, if any, books are you writing or plan to write?
Book proposals are recommended even if an author is self-publishing because the proposal is a business plan for the book. As your own publisher, you would want to base your decisions on the same information as traditional publishers--that is, if you want to the book to sell successfully.
Your book proposal is a very important step in the process and must be done correctly to garner any attention. There are many good books to help you with format, etc. Many people come to me for help after their proposals are rejected and end up having to redo the entire project, which is a time-consuming activity. My advice to you is to find out how do it right the first time.