Great! Yes a library would be wonderful wouldn’t it! I just thought the book swap is easier as we probably want to keep our books at home most of the time 
But it looks like we’re not a TON of people interested, so rather than over engineer it: we could
1- start a thread where we dump photos of the books we have that we’re happy to bring Borrow my sewing books
2- make it a feature of craft night (and people can chat 1:1 about keeping the book a little longer)
Then if it grows into a bigger thing, I’m still happy to put together a little system for it
wdyt?