Luckily there is a collection of a large number of textbooks (Library Genesis, approx. 1 million) available online, curated in russia originally on dvd's that can be found by anyone determined enough to look. They have books that I needed to wait 2-3 weeks to get at the university library, because they were in storage.
Damn, that will be fantastic for rare and out of print stuff. If I had known when I was in school... Although citing books that aren't in the university library might be problematic.
