EPUBReader 1.4.1.1 By epubreader Read EPUB files just in the browser. No installation of additional software needed.
http://www.epubread.com/en/ I've been using it 2 or 3 weeks now, the book I wanted to read is two pages side by side and part of the right goes out of sight unless I make it too small for me to read. I think it's probably fine for most people.
It allows you to use ctrl + a to copy the whole chapter, I paste it into Seamonkey and view the html and copy what's inside the body and paste it into a template with one big and b bold. I've read 6 chapters now, can't read long at a time. Pretty handy.