Reddit reviews Fairies: A Dangerous History

Hello! I am not OSP but figure I might be able to help a little bit (at least with the first question). For me, at least, when I hear "Fae folk" the first thing I think of is what became of the Irish's "Tuatha Dé Danann". This is not to say that other countries don't have their own "fae" or "spirit" beings (domovoi, hobgoblins, etc), but if I were you I'd start by reading up on Irish mythology. So you could probably check out books like, Tales of the Elders of Ireland or The Tain. If not that, then there are more general books like Fairies: A Dangerous History (I've never read it, but did a quick check on the author and they're a lecturer of Renaissance Literature so it at least sounds decently founded). Besides that, if you're in school and have access to a scholarly database or library you could always try looking up journals/articles relating to them within history or religion and culture. Hope that assists you. :)