This morning I started Black sun by Rebecca Roanhorse: 2 chapters in, it's got LOTS of possibilities 
Trail of Lightning and Storm of Locusts by Roanhorse were both quite good. I look forward to Black Sun.
This is the first I'm reading from her.
The story and worldbuilding, and most of the characters, are very good, I keep wanting to know/read more, but one thing that is REALLY getting to me are some words.
I'm used to invented names, races and places, after all, that's the bread-and-butter of SFF: but invented grammar (at least I assume they're invented)? That is super grating, and my brain just blocks and stumbles on those sentences (to the point where I'm mentally replacing them with the normal words, just for ease of reading). Maybe those words are now normal amongst the "young crowd", who knows, but for this middle-aged woman it does look just like invented things, hehe
I finished this one last night, and I'm happy to report that the above reduced in importance and my brain adjusted, hehe
It's a great book, and I love the mishmash of cultures, mostly aztec/inca type. The main characters are great, and I loved Xiala, the Teek ship captain - I want a book just with her, hehe
However....
It's very much NOT a standalone book, despite what some reviews say

yes, there is some closure, but it's more a "chapter/short story closure" than a "main story closure". And book 2 only comes out (hardcover) in March 2022, so it'll be a good 18 months until I read book 2

I've now started
The binding by Bridget Collins, which I thought it was a sort of historical fiction but it's looking to be a lot magic fantasy/fairytale in the likes of Naomi Novik (off-Temeraire)!