Is Google going into the libraries and destroying all extant copies of these books? That's the only way they'd be the "exclusive source of access to these books."
I teach at GMU (English); the library here has links to both Zotero and Endnote (with a site license for the latter. I wonder how much that cost?).
I plan to ask the library to drop the license for Endnote; why pay them to sue us?
I encourage my research writing classes to use Zotero anyway.
"Well, it don't make the sun shine, but at least it don't deepen the shit." -- Straiter Empy, in _Riddley_Walker_ by Russell Hoban