I really enjoyed The Explosionist–alternate history! mysteries! Scotland!–and so I was expecting to have the same reaction to Invisible Things. Unfortunately, I wasn’t nearly as entranced. I’m not sure exactly why this is, and plenty of other reviewers have liked it just as much as the first book, so take my reaction with a heaping pinch of salt. But the sudden weaving in of a certain fairy tale was sort of jolting, and I found Sophie less sympathetic.