Though I’ve mentioned it several times, it’s worth repeating: the Internet Archive is a truly wonderful resource. It contains a wide variety of legal downloads in the open domain. I’m currently reading a little Origen (disseration work) while listening to recent Béla Fleck Christmas Concerts.
For the latter below, go here or here, or just listen below.
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[...] excellent information regarding a newly released site: OpenLibrary.org. It is an offshoot of the already mentioned Internet Archive. In addition to providing a whole host of open-domain books in full text (just [...]