Pirate King is a book by Laurie R. King and was published on September 6th, 2011. It is the eleventh in the Mary Russell and Sherlock Holmes mystery series.
Set in the fall of 1924, Russell is sent undercover to Lisbon and Morocco, to investigate a series of crimes committed against a film production of The Pirates of Penzance. But the stakes are raised when real-life pirates appear on the scene.