Thanks to @Deykun for the link!
For folks interested in historical fiction on the Aztecs, I've always dug Gary Jenning's Aztec, which really brings the culture to life - not just the Aztecs, but the surrounding tribes and nations as well. As such, it comes with a heavy content warning. Readers should be aware that there's a lot of graphically described sex and violence, including a number of things beyond taboo in Western society. It's written as genre fiction (so kinda pulpy in some parts), not a historical account, but nonetheless makes for a fascinating read.