A while ago I met with an ethnologist at Sofia University, who gave me a nifty reading list. I can’t promise I’ll actually be able to read (or even find) all of the resources, but if you’re as interested in 16th-century Bulgaria as I am, you might be interested in:
Ethnography and Folklore:
Etnografiya na Balgaria by Khristo Vakarelski
Anything by Mikhail Arnaudov
Balgarski Folklor by Petar Dinekov
Morphology of the Folktale by Vladimir Propp
Wild Tales by Nikolai Khaitov
Anthology of Bulgarian Poetry by Peter Tempest
The Inn At Antimovo And Legends Of Stara Planina by Yordan Yovkov
History
Anything by Vera Mutafchieva
History of the Bulgarian People by Petar Mutafchiev
Fiction
The Iron Oil Lamp by Dimitar Talev
Elin Pelin short stories
Time of Parting and the movie “Time of Violence” (cause you know, it’s a movie)