The Collected Mysteries of Sherlock Holmes is a collection of eight complete books featuring the world's greatest detective. Included are; A Study in Scarlet The Sign of the Four The Adventures of Sherlock Holmes Memoirs of Sherlock Holmes The Hound of the Baskervilles The Return of Sherlock Holmes The Valley of Fear The Casebook of Sherlock Holmes Sir Arthur Ignatius Conan Doyle was a Scottish physician and writer, best known for his Sherlock Holmes detective stories and for the adventures of Professor Challenger. He was a prolific writer whose works include science fiction stories, plays, romances, poetry, non-fiction and historical novels.