Sherlock Holmes is a fictional character created by Sir Arthur Conan Doyle in 1887. Doyle introduced Holmes, a mastermind detective who uses scientific reasoning and deduction to solve crimes, in "A Study in Scarlet" and went on to write over 50 stories featuring Holmes and novels like "The Hound of the Baskervilles." Holmes lives at 221B Baker Street in London and is known for his brilliant yet eccentric detective methods. Conan Doyle was inspired to create Holmes based on his former medical teacher Joseph Bell, known for his powers of observation and deduction.