File types for ebooks explained
Here are the major categories of ebooks
• PDF. This format by Adobe, the Portable Document Format, has been used to allow anyone with a computer to read a file with text and images. Technically, it is Adobe's Reader format, but everyone just calls it a pdf. And that was the standard that ebooks started with, but it has fallen out of favor in recent years as the type doesn't flow correctly in ereaders. Avoid pdf.
• Epub. Epub is the standard for ebooks. It allows text to flow, allows images, and works for any type of ereader from an iPad to a Nook. Libraries started including this format a few years ago. The only ereader that can't read epub formats is a Kindle.
• Kindle. In spite of the fact that the epub format is the most universal, the success of the Kindle ereader is forcing libraries to supply this format, too. Since the vast majority of people who are reading ebooks are doing so on a Kindle, this will probably become the standard, and other devices will have to follow.
I hope that this helps.
Posted by Brad Hall