Wings Above The Diamantina by Arthur W. Upfield

The discovery of a stolen red monoplane on the dry, flat bottom of Emu Lake meant many things to many people: for Elizabeth Nettlefold, it meant a new purpose in life; for Dr. Knowles, brilliant physician and town drunk, it meant the revival of a romantic dream; for person or persons unknown, it meant a murder plan gone badly awry; and for Detective Inspector Napoleon Bonaparte, it meant one of the toughest cases of his career.