Arkady Martine’s novella is, in theory, a locked room murder mystery. If it had to be described and shelved by people who wouldn’t otherwise be reading it, that’s where it would reside. In our case, it would be a locked by AI in a haunted architectural artist-created mansion murder mystery. But in that case, in a novella, the detective who solves that mystery would be the central character, and the resolution of that mystery would be the end of the book, tying a neat bow around the puzzle box. And while there is a detective, she’s a cop, and the