Hmmmmm, very well written, with lyrical prose, great atmosphere, a gritty, oppressive enclosed world, and the struggles of prejudiced people trying to survive alongside each other. The places and races are made up, but from what I gather, the heroine and her people are East Asian, and her love interest and his people are Middle Eastern/Russian/ambiguous white. What bothers me is that the threat of rape is so prevalent in this world. Maybe it is because the slaughterhouse where the story takes place is practically a prison, with all of its workers literally slaves whose debts forever grow past their ability to work off, and with corrupt, perverts in charge, everyone below ends up taking on their filthy habits. Regardless, it sucks. The first couple of mentions worked with the story, but as I progressed into the latter half, I was ready to start castrating people. Arguably, karma comes around, but it is indiscriminate; like solving the terrorism problem by nuking the entire Middle East. 
 If you can stomach the rape threats, then the handling of everything else (strain between racial groups, mystery of the "ghost" haunting the factory, the love triangle, earning respect through actions, mounting tension of multiple threats to girl and well, everyone) is nuanced and well done.