Three years ago this thread was posted with two responses.
https://www.reddit.com/r/AskHistorians/comments/2v56oz/nonfiction_history_of_plague_doctors_andor/
Are there any books out there covering Plague Doctors themselves, rather than the Black Death as an event?
I'd like to know this as well, as I sort of have a bit of an opsession with that period.