I might be helpful to think a little outside the box. Which I just learned to appreciate:
A tutorial to rename the .epub to .zip and extract all content html and jpeg from a epub, with the possibility to split, rearrange, edit the ebook content.
http://www.howtogeek.com/howto/19268...e-html-editor/
Unzipped I can easily and fast access the content of the ebook.