Confusingly either an alternate Caribbean/Aztec set sci-fi or a steampunk militia fantasy without much world building. It tends to drift. Not written well and whilst I appreciate the dialogue was supposed to make you feel like they couldn't speak "English" well, it was just jarring and unnecessary. Didn't get that far, but apparently John's hand grows back once he regains his memory? Like a man with one hand can ever have a full memory? Or a full life?