The Sign of the Four and play adaptations insure this book: The Sign of the Four was also adapted for radio by Bert Coules in 1989 as part of BBC Radio 4's complete audio Sherlock Holmes, with Clive Merrison as Holmes, Michael Williams as Watson, and featuring Brian Blessed as Jonathan Small. The Sign of the Four The Sign of the Four (1890), also called The Sign of Four, is the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle. Doyle wrote four novels and 56 short stories featuring the fictional detective. The story is set in 1888. "The Sign of the Four"
Sherlock Holmes pastiches nunca" (2004), where Sherlock Holmes meets Mary Poppins. The Conan Doyle estate commissioned Anthony Horowitz, author of the Alex Rider novels, "The Power of Five" and TV's "Foyle's War", to write a new, uniquely "authorised" Sherlock Holmes novel. Published by Orion Books in 2011 under the title "The House of Silk", the content and title were a "closely guarded secret" before publication. . The BBC's TV series "Sherlock" re-imagines Holmes and Watson (played by Benedict Cumberbatch and Martin Freeman) as contemporary figures with Watson publishing his accounts of Holmes' exploits online. The US TV series "Elementary" features a modern Holmes