Ife-Iyoku, Tale of Imadeyunuagbon is an 18k word post-apocalyptic, African speculative fiction, sci-fi, fantasy, novella by Oghenechovwe Donald Ekpeki. It is one of the works in the Dominion Anthology and available to read for free here. It made both the Nerds of a Feather, Hugo recommended and the Locus recommended reading list. It was also a finalist in the British Science Fiction Association award, Nommo and the Nebula award, novella category.
You can purchase the Dominion Anthology to read the rest of the stories, here.
The Ife-Iyoku novella has been reviewed in a number of places, alongside the Dominion Anthology.