You are more than an author, a publisher, or a publicist; you are an information provider.
Nonfiction authors provide information and you should provide your information in any form your reader wants: Book, special report, audiotape, videotape, speeches, seminars, consulting, etc.
Some of your customers want your guidance (information) but are too busy to read your book. Some may commute a long distance and want your help on tape. They have time to listen to you.
Once your book is out, use it as a script and record an audiotape album. Bundle the book with the tape set so those listeners can find the text they wish to review without searching the whole (linear) tape.
Viz-Ability marketing specialist Raleigh Pinskey sold You Can Hype Anything to Carol Publishing. Then she redrafted the text into the spoken word (with contractions), recorded it and self-published the tape album.
Her next book, 101 Ways to Promote Yourself, was sold to Avon and she sold the audio rights to B&B Audio. http://www.PromoteYourself.com
See Document 635 AudioBooks; Turning Books & Speeches Into Spoken-Word Disc Products At
http://parapub.com/getpage.cfm?file=products.html
“Spoken-word audio turn your car into a university.”
—Judith Sinclair, author, Making Pigs Fly.
You are selling your expertise and research—it is called information.
