Catholic Internet Book Swap?

Does anyone know of a Catholic book swap on the web? I’m not finding one, but maybe I’m not looking in the right place. I’ve been looking into book swap sites and most of the Christian books available seem to be light Christian fiction (like the Mitford series), the Left Behind series, and stuff like The Purpose-Driven Life. Any suggestions? Does anyone belong to any book swap? How do you like it?

Maybe you could start a real life swap at your Parish?

Starting a parish-level group isn’t an option for me right now but I sure would like to find one on the internet.

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