Doyle wrote four novels and fifty-six short stories about Holmes, including masterpieces such as "The Sign of the Four," "The Hound of the Baskervilles," and the collection "The Adventures of Sherlock Holmes." These works revolutionized detective fiction with their brilliant logical deduction and unforgettable characters.
Beyond detective stories, Doyle was a prolific author across many genres. His science fiction novel "The Lost World" (1912) introduced Professor Challenger and pioneered the dinosaur adventure genre. He also wrote historical novels such as "The White Company" and "Sir Nigel," which he personally regarded as his finest achievements.
In his later years, Doyle became deeply devoted to spiritualism, lecturing and writing extensively on the subject. He died in 1930, leaving an enduring legacy as one of literature's most influential storytellers.