Chris Gravett is a former Senior Curator at the Royal Armouries, Tower of London, and a recognised authority on the arms, armour and warfare of the medieval world. He has worked as an advisor for numerous TV and film productions, and has written many books for Osprey, including Warrior 1: 'Norman Knight 950-1204 AD'. He currently works as a curator at Woburn Abbey, Bedfordshire, UK.

Graham Turner is a leading historical artist, specialising 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.