@Luke Book swap is something that I least in this part of Spain it has never worked. I recalled that in school son had to do it , they took some book to school and during all year they had a book swap stand in class. But outside of that, nothing.
@ghostdancer It doesn't work in a lot of places in the UK either. It is a "nice" neighbourhood so they don't get vandalised. Also I suspect there is just a small number of people that engage with them really. I usually just drop off books rather than take them. Quite often the same books are sat there for months at a time.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko