Library detective Rudyard Mack, with the help of outspoken library union leader Arbuthnott Vine, leads us through the corridors of power in one of the country's showplaces, the New York Public Library, in pursuit of the biggest stamp theft in history. The centrepiece is the 'Inverted Jenny', the rare 24 cent 1918 airmail stamp, in which the mail plane was printed upside down. ”... excels like the best of detective fiction,” Canadian Stamp News