Though Professor Moriarty has perished at the Reichenbach Falls, Sherlock Holmes must still pit his wits against his old and deadly enemies - the malevolent blackmailer Charles Augustus Milverton, and the murderous Colonel Sebastian Moran. In this collection the author also gives us another of his own fictional creations: the sardonic Martin brett - a more modern equivalent of the great detective - in four further ingenious stories of murder and mystery.