The Bookbinder's Agreement

A tale of history and intrigue. The reigning monarch of the UK may not be the rightful ruler. Documentation proving an alternate, legitimate line of ascension has come to light in the hands of criminals. Is the royal house vulnerable to attack? In late 19th Century England, the monarchy is unpopular, especially the King. Can the King survive? Can Scotland Yard find the criminals and the documentation before the monarchy has to decide between a ransom and public humiliation?