The Hound of the Baskervilles

This is an okay book written by Arthur Conan Doyle. When rich landowner Charles Baskerville is found dead at his manor, it appears he died from a heart attack, but his friend thinks a supernatural dog is responsible. Since Holmes is busy working on other cases, Dr. Watson is sent to the residence to take notes and determine what is going on.

The story was published in 1901. The idea came from the legend of Richard Cabell, who died in 1677. Legends arose claiming that a phantom pack of hounds would howl at his tomb, and his ghostly image could be seen leading them. There is a legend in the British Isles about a ghostly black dog that was larger than normal and had glowing eyes and was considered a portent of death. The Baskerville effect is an observation that psychological stress can increase the chance of a heart attack.