Robbie MacNiven has a PhD in American Revolutionary War massacres from the University of Edinburgh and a War Studies MLitt from the University of Glasgow, where he studied the Vietnam War. Besides writing for Osprey, he writes science fiction and fantasy novels as well as producing game scripts and audio dramas.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.