Sherlock Holmes is a fictional detective character created by British author Sir Arthur Conan Doyle. Holmes first appeared in the novel "A Study in Scarlet," published in 1887. He quickly became one of the most famous and enduring fictional detectives in literary history.Holmes is renowned for his exceptional deductive reasoning and keen observation skills. He lives at 221B Baker Street in London, and his loyal friend and chronicler, Dr. John Watson, often accompanies him on his cases.