The first Sherlock Holmes adventure! The introduction tells me that Conan Doyle wrote for serials, which I didn't know but, after reading this, does not surprise me. There's a rather episodic feel to it, and I'm not wholly convinced by the structure. The second half begins with a lengthy Mormon backstory, a love story ending tragically, and while it's there to give some personality and motivation to the murderer and the victims, I think I'd rather have stuck to the mystery proper than gone on that odd but entertaining detour. The whole is a good introduction to Holmes, though, and the meeting between him and Watson, and how they set up together in Baker Street, is fun to read.