…at your local library!
Very excellent idea. Judging from the titles on Catholicism (and Christianity in general) at my local library, you’d think it was a bizarre cult with only James Carroll and Hans Kung to defend it.
It was his book Practicing Catholic that inadvertently set me on the road back to the RCC. It was so unfair and so crude that it could not be true i fumed.
Another good way to do this is to donate your own surplus books to the local library. As long as they are in good shape, they almost always accept them.