The Libraries hold a variety of notable specialized and unusual collections. Examples include the world's largest assembly of materials on Sherlock Holmes and his creator Sir Arthur Conan Doyle;[4][5] the Kerlan Collection of over 100,000 children's books;[6] the Hess Collection, one of North America's largest collections of dime novels, story papers and pulp fiction;[7][8] the James Ford Bell Library of rare maps, books and manuscripts,[9] and the seventh largest law library in the United States, including over 1 million volumes and personal papers such as those of Clarence Darrow.[10]