[ljvmiranda]

Highly recommend playing Pentiment. Good mystery adventure set in the backdrop of medieval Bavaria. Large part of the story happens in a monastery (and the surrounding town).

[bamfly]

See also:

https://en.wikipedia.org/wiki/The_Name_of_the_Rose

(it's a mystery, so careful reading too much about it before picking up the book...)

and

https://boardgamegeek.com/boardgame/915/mystery-abbey