Either Project Gutenberg:
http://www.gutenberg.net/browse/IA_H
just scroll down to Homer and the below is also a good source of ancient history texts:
http://www.fordham.edu/halsall/ancient/asbook.html
if you want to create ebooks from use the Microsoft plugin I use it to convert text , also try
http://esspc-ebooks.com/default.htm
Hope this helps