I guess this isn't my kind of alt-history. While I am intrigued by versions of this time period that have Aztecs as a major political power (like the "Curious Case" stories at the Dunesteef), I felt like that just kind of existed in the background where it didn't get much attention and instead it focused on the mystery. I'm not sure exactly why, but the mystery genre rarely grabs my attention--I just usually don't care enough to engage with it fully and try to figure out the killer, I just kind of ride along until the killer is revealed, and that was how this one was for me. I listened to about 3/4 of it, and I thought the writing was smooth and I thought the characters were kind of interesting, but I realized that I didn't really care at that point how it ended, so I skipped to the outro.
One thing I did find a bit confusing about the story production was that I kept losing track of which Alasdair-voiced character was speaking. Early on, I didn't realize that there was more than one Alasdair character, which was even more confusing, and I kept wondering why he only sometimes had a lisp. If Alasdair had voiced the entire story then I don't think I would've been confused by it, but because there were multiple voice actors it for some reason threw me off to have one of the actors (and specifically the non-narrating actor) voice more than one character.