EPUB - Open eBook File is one of the best digital ebooks around. This is more of a XML based format specially designed for digital books. Publications are included as well. There are also many different types of software programs that you can use that actually support this type of digital book. The kindle, is just one of the many different devices you will be able to use with this format. As long as you have a device that is authorized to actually view ebooks, you will be good to go. There are also three different open standards that stay up to date by the international digital publishing forum, in which you can take advantage of as well. When it comes to EPUB, it is definitely something you should consider taking advantage of. You will not regret it. You can take a look at it just to see how it works.