Sherlock Holmes was a character in a book by Sir Arthur Conan Doyle The company at 221B Baker Street received hundreds of letters addressed to Sherlock Holmes The stories often start with an interesting letter or a visitor to his flat in Baker Street What people love about Sherlock Holmes is that he seems to know everything just by looking at people Sherlock Holmes was the first detective to use that logical way of solving a crime Lots of the things he did in the books were new things for the police at the time