I have great respect for writers who can create entirely different worlds without succumbing to the need to explain every little detail of the world’s workings. Felix Gilman accomplishes this with The Half-Made World. His world is nothing like our own. There is the barest patina of the Wild West to it in the set dressings and costumes: frontier towns, guns and lawmakers, the looming spectre of industrialization, and disillusioned soldiers from a forlorn…