Charles Augustus Milverton (Unabridged‪)‬

Holmes and Watson push the limits of the law when they confront the machinations of a blackmailer whose victims either pay dearly or suffer life-destroying humiliation. Holmes is hired by the debutante Lady Eva Blackwell to retrieve compromising letters from a blackmail artist named Charles Augustus Milverton, a man who causes Holmes more revulsion than any of the 50-odd murderers in his career.