First, a caveat. I’m a (lapsed) historian; for me, reading historical fantasies and alternate histories unavoidably sets of alarm bells in the positivist/materialist corners of my brain. That’s largely my problem, not the genre’s. Mary Robinette Kowal’s new novel, Ghost Talkers (Tor, August 2016), her first since wrapping up her five-volume Glamourist Histories, is, like that earlier series, a historical fantasy, and an engaging and readable one at that. But the fact that it’s a historical fantasy set during the Great War, which was one of my areas of focus during my studies, means that I brought more than the usual baggage to this book when I read it. My take on it is more complicated than the typical reader’s would be.