Library Genesis links the two:
— here primary content, i.e. all the new books being added there
— the original resource, but for some reason there new books fall with a large amount of time, but there is a forum for both sites, discuss the development project perspective, changes everything.
You can search for the book at the sites and download all the torrent (>2Tb books, and with the pace of development need not less than 3Tb of space) and locally to raise the server with the database, you get a local copy of these resources. How to do it written on the forum gen.lib.rus.ec/
, links to torrent jump find on free-books.dontexist.com/