This is the fifth book in the Gunner Wales series. The Adventures of Gunner Wales, More Adventures of Gunner Wales, New Adventures of Gunner Wales, Mist Stories of Salmon City, and this title: The Royal Game of Ur Mystery. It is a detective series that follows the adventures of a genius detective who is a world traveler, student of many languages, and in a sense, a modern-day Sherlock Holmes. Gunner not only solves mysteries and crimes by deductive reason, but by the power of science.