In order to make your eBook more downloadable, you must make it available in as many formats as possible. This will make your potential target download your ebook.
You must learn how to create ebook in different format. Most of the time, ebooks can only be read using selected browsers and softwares. People will tend to leave you because of them do not have time to install the software needed to read your content. It would be good to just make it available in different format so that your potential customer can download it without installing new programs. They don’t have time to do that.