Adding EPUB format to most of my ebook catalog

I've begun the slow process of adding the ebook format known as epub to my catalog. For years I have been selling ebooks in multiple formats, and I have decided that the time has come to add another one to the mix.

The epub format has been developed in the attempt to offer the publishing industry a standard format for presenting digital reading materials. This is a great idea but I took a wait and see approach over the past year to see if the format actually emerged as a standard. Having watc...