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/Converting your book format to PDF format

Finding a Print on Demand Company

ISBN Number—Buying ISBN numbers yourself or using POD company-supplied number.

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.