Some of the greatest classics have gone in and out of print, which makes it a bit difficult to find that great book you've been told you must read. How do you find a classic that's gone out of print?

Of course, there are always ways... You may find the book in a library, in a used bookstore, or you may conduct an online search. In a recent article for The Guardian, David McKie talks about those great classics that have been brought back by publishers like Ravenhall Books. How have you found those long-lost classics you've enjoyed?