Allingham M.: Sweet Danger 

Designed to appeal to the booklover, the Macmillan Collector's Library is a series of beautiful gift editions of much loved classic titles. Macmillan Collector's Library are books to love and treasure.Aristocratic detective Albert Campion is called upon by the British government to establish ownership of the tiny, oil-rich principality of Averna on the Adriatic Coast. The titled but impoverished Fitton family lay claim to it, but the deeds are nowhere to be found. With the help of his loyal chums and sidekick, retired cat burglar Magersfontein Lugg, Campion must pit his wits against a criminal financier and his heavies in order to unearth the truth.A quintessential Golden Age detective story and utterly gripping thriller, Sweet Danger displays Margery Allingham at her absolute best .