Thomas Harlan writes an interesting alternate history Sci-Fi series collectively titled "In the Time of the Sixth Sun" where the Aztec and Nippon (Japanese) empires together became the dominant force (the Mexica Empire), and eventually became a new interstellar empire in a universe with of lots of ancient and powerful races. The main character is a woman archeologist investigating artifacts on ancient worlds.
I think the books are quite interesting and well recommended:
- "Wasteland of Flint"
- "House of Reeds"
- "Land of the Dead" (just came out - I have not read it yet)
If I remember right, one of the things which causes his history to diverge from ours is that Christianity remains a small cult, so eventually the Aztec conquer Europe instead of the other way around. But that is just my simplistic recollection. Note that the books do not dwell on this history much - the setting is in the future.
THANK YOU SIR!!! I've been wracking my brain FOR YEARS trying to remember this series. I flipped through one of these books a long time ago at a bookstore. I thought "hmmm, interesting. I should pick this up sometime when I have money." Then never could remember or find it again.