Incidentally, I neglected to mention that the program I use to convert to ePub is calibre - E-book management
It will convert to/from multiple formats. I save my ePub in a dropbox folder and then open it into iReader. Today, for study notes, I converted an html file into .mobi and loaded on to my Kindle Paperwhite so I could study on the plane tomorrow for a Church History class I'm taking from Dominic Aquila.
Rich, this is very helpful. Thanks.