Where can I download free ebooks for Android?
Check out this link.
download moon+ reader or aldiko from and import epub format ebooks
check out these links , these may help u out
hope you like these :) http://www.openculture.com/free_ebooks
perhaps follow this link https://play.google.com/store/apps/details?id=com.ebooks.android&hl=en
If you love classics, Project Gutenberg is a treasure trove. Or if you want newer selections, head to hundredzeros.com/ which lists books from Amazon that are currently free, but the deal is only for a handful of countries.
If you mean illegal I can't help.
If you want legal then here is a make use of article on the topic.
This only gives you free copies of older books which is the sad thing. I have not found any treasure troves of free ebooks out there (I have looked for awhile) so you may just be stuck with this. Sorry about that if this doesn't help :(