Feedbooks has an incredible selection of ebooks, nicely formatted for many ebook devices.
Here's their link:
http://www.feedbooks.com/
They offfer an easy-to-navigate system, unlike some sites that are very cluttered and confusing in their presentation.
In fact, some sites are so confusing that one often wonders where they learned web-design. (
Bugs Bunny's Three Week School of WebDesign, perhaps?
)
I like Feedbooks a lot, and find them second only to MobileRead's hand-crafted, personally assembled selections.
Have fun!!
Don