Christopher Gravett has worked as a curator both at the British Museum and at the Royal Armories at the Tower of London. Currently he is curator at Woburn Abbey, Bedfordshire. He has written many books on medieval military history, arms, armor and castles. John James studied figurative illustration and specialized in historical reconstructions and architectural drawings for many years. He has worked on a number of non-fiction books for children, including an award-winning title on Egyptian pyramids. He lives in Britain.