I use stanza on my Iphone for reading ebooks. To create the ebook I use book creator which is a MS Word Document Template File. It requires the installation of Calibre as well. Once set up its quite easy to use and ==X== who wrote the template it has his own following here.
See this link.
https://www.mobileread.com/forums/showthread.php?t=28313
This is the Book Creator thread with all the links to Calibre as required.