Coming up with monthly reading themes

I am thinking to start suggesting monthly reading themes for the community. I think it will be a great way to explore more literature within the genre. For now I am thinking of each month having a specific theme and I can look up around 5 books that fit in with that theme as reading suggestions. But you don't have to stick to them!

Some themes I have in mind so far are: foreign authors, female authors, authors new to the scene (so like first publication). Along with various kinds of fantasy like urban fantasy or high fantasy.

Do you guys have any suggestions for what to add?

(also I want to thank @longooglite and @MrBGone for the idea!)