The Boscombe Valley Mystery by Arthur Conan Doyle
I was going running/walking at the park the other night and didn't have anything to listen to. I found "The Boscombe Valley Mystery" on Audible's Mystery Channel and it was just the perfect length for how long I wanted to spend exercising. I have been a Sherlock Holmes fan forever, but I don't remember reading this one before. That doesn't necessarily mean I haven't though - I don't have the best memory.
What seems like an open and shut case - James McCarthy killed his father - of course isn't and it's up to Sherlock Holmes to prove James' innocence. There's not much action, but we do see Holmes doing a thorough crime scene investigation, even making use of his knowledge of tobacco ash.
I guessed who the killer was, although I didn't know all the ins and outs of why. For a short story, the motive is pretty complicated and I enjoyed the solution. Holmes softer side comes through a bit...