I work in a university library. On multiple occasions, “I Believe in Sherlock Holmes” flyers have been found inside the Sherlock Holmes books, so there are clearly some BBC Sherlock fans in my midst.
We have three shelves of books on Sherlock Holmes and Arthur Conan Doyle, and they are sorta high up. I just put a post-it note on the bottom of the shelf where it’ll only be visible to people looking at those books. It says:
…And on the back are the call numbers for the Raffles books.