The Hound of the Baskervilles by Sir Arthur Conan Doyle
The Hound of the Baskervilles was a re-read for me. I've read or listened to most of the Sherlock Holmes stories and novels over the years, but I always enjoy them.
Sir Henry Baskerville needs Sherlock's help. He's inherited a house in Dartmoor, at the edge of the moor, in rather unpleasant circumstances. The former landowner, Sir Charles died of a heart attack, apparently while feeling from a giant hellhound, the family's curse. After a brief time in London, Sir Henry heads off to his new estate along with Watson, who has strict instructions to stay with Sir Henry and to especially never let him go out onto the moor alone. Holmes can't go with them because of some reason or other. We meet all the locals, including the servants of the house and the neighbors, a bug collector and his wife. To complicate issues, there's also an escaped convict lose in the area.
It's a good solid mystery. Watson is his loyal...