Sir Arthur Conan Doyle wrote the 1902 book “The Hound of the Baskervilles”. It’s one of many in the Sherlock Holmes series, which Doyle is very famous for. This particular book is the third in the series, and is about the death of a man named Sir Charles Baskerville. Sherlock Holmes is hired to solve the murder, which took place in the Baskerville manor. Sir Henry Baskerville is the new owner of Baskerville Manor, but he’s oddly suspicious of how Sir Charles Baskerville died.
This is the first appearance of Sherlock Holmes after “The Final Appearance”, which was supposedly his death. This may have been the inspiration for BBC’s “Sherlock” writers to have Sherlock fake his death. Whatever the reason this happened, it was “The Hound of the Baskervilles” that created the popularity of Sherlock that we see today.