The following items are the steps or the process that you will need to go through to get your niche-market book published via the Desk-Top Publishing (DTP) process:
Writing/Layout of the Actual Book
Finding a Print on Demand Company
ISBN Number—Buying ISBN numbers yourself or using POD company-supplied number.
Converting your book format to PDF format
Submitting a digital copy of your book—Uploading print-ready files (PDF-format) to the POD Company
Ordering a proof copy and final editing the book.
Order copies of your book to market the book yourself.
Set up marketing routes via the POD Company (Distribution Channels)
Establishing yourself as a (publishing) business/company.