A lot of publishers selling ebooks decide to put all of their eggs in the Amazon basket. I don’t, I sell wide — that is, at as many retail and distribution outlets as possible.
You can price an ebook as free on Amazon’s Kindle Direct Publishing platform — they just don’t make it easy. And it isn’t always a good idea.
How To Publish Your Ebook by Joanna Penn showcases a training program that takes you through publishing to the Kindle, the Nook and other e-readers