Suppose you have your ebook in .epub format, which is an electronic publication standard used by reading tablets such as the iPad and the Nook. Now you wish to convert it to .mobi format, which is used by the Kindle. Here's what you do:
- Download Kindle Previewer for free. This is a graphical user interface tool, that emulates (on your mac or PC) how books display across Kindle devices and apps.
- Once it is downloaded, open it. Then click File->Open Book, and select your .epub file. Having being converted to .mobi in the background, your book is being displayed in the Kindle Previewer.
- Quit Kindle Previewer. Go to the folder where your .epub file lives. A new folder has automatically been created there, and in that folder, you will find the automatically converted .mobi file.
Note: here is my interview on Ann Haines blog.