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Similar (has been around for maybe 20 years): https://www.bookcrossing.com/ https://www.bookcrossing.com/ which influenced public book cases in Germany accordin
by ck45 4y ago
Similar (has been around for maybe 20 years): https://www.bookcrossing.com/ https://www.bookcrossing.com/
which influenced public book cases in Germany according to https://en.wikipedia.org/wiki/Public_bookcase https://en.wikipedia.org/wiki/Public_bookcase
The wikipedia article also links to a OSM map