London-born Si Sheppard completed his Bachelors and Masters degrees in New Zealand before receiving his doctorate from Johns Hopkins University in the United States. He is currently an associate professor of political science and international relations at Long Island University in Brooklyn, New York, and has written several titles for Osprey focusing on the interrelationship between geography, technology, and strategy. He lives in New York, USA.
Graham Turner is a leading historical artist, specializing in the medieval period. He has illustrated numerous titles for Osprey, covering a wide variety of subjects from the dress of the 10th-century armies of the Caliphates, through the action of bloody medieval battles, to the daily life of the British Redcoat of the late 18th century. The son of the illustrator Michael Turner, Graham lives and works in Buckinghamshire, UK.