Also like knowing there's a gumshoe Aztec story I have yet to read, TO THE BOOKSTORE
key aspect that I think has simultaneously made Nazis and Confederates dominant and made highlighting any other subgenre within AH very difficult. Hint: it involves the Erotica Readers and Writers Association
I suspect modern AH will remain more popular than pre-modern AH (sorry Sumerians) due to its greater relevance to peoples lives.
Pre-modern PODs seem popular if they're a history 'everyone knows' and especially if them carrying on into the present day is 'cool'