Dr Nic Fields started his career as a biochemist before joining the Royal Marines. Having left the military, he went back to university and completed a BA and PhD in Ancient History at the University of Newcastle.

He was Assistant Director at the British School at Athens, Greece, and then a lecturer in Ancient History at the University of Edinburgh. Nic is now a freelance author and researcher based in south-west France.

Adam Hook studied graphic design, and began his work as an illustrator in 1983. He specializes in detailed historical reconstructions, and has illustrated Osprey titles on subjects as diverse as the Aztecs, the Ancient Greeks, Roman battle tactics, several 19th-century American subjects, the modern Chinese Army, and a number of books in the Fortress series.

His work features in exhibitions and publications throughout the world. He lives in East Sussex, UK.