It goes without saying that before you can “post” and market an eBook you must first have a book. If you have a completed manuscript, either fiction or non-fiction, you can relatively easily take the next step and convert it to an eBook.
Your first step is to get your book into a digital format. If you wrote your book on your computer as a Word.doc you have already accomplished this project. However, if your manuscript was completed a number of years ago and you have only a “hard” copy you have two choices: you can either scan your manuscript and convert it to digital that way, or you can simply have someone re-type your manuscript and save it as a Word.doc.
Once you have your manuscript in digital format (either Word.doc or PDF) you can proceed and convert it into an eBook format. To date, there are two of these that you can choose from: The iPad needs an ePub format, while Kindle needs Mobi. Now, you can upload it as a PDF, but this is typically problematic for both iPad and Kindle, as it mandates a lot of scrolling and the pages may not “fit.”
Once your book is in eBook format you next need to make it available to the public. To do this you should go to Kindle and set up what is known as a KDP, or Kindle Direct Publishing, Account. In doing so, this makes your book available on Amazon, as Amazon owns Kindle. (Currently, Amazon is selling more eBooks than hard copy books, and it is most likely that the trend is not going to reverse itself.)
Accomplishing this is a process, but you can do it! (AUTHORS NOTE: You can expect to receive about 70% of the sales price with eBooks sold on Amazon, though this can vary due to fulfillment arrangements and so on.)
You are not limited to selling only on Amazon, but that is yet another process to be discussed another day!