Mark Harrison has a Bachelor's degree in Medieval Studies from Lancaster University. He is a Curator at the Royal Armouries, Tower of London and has a strong interest in the early medieval world. He lives in Colchester, UK. Ian Heath is a highly respected author, currently working on a five-volume project covering the armies of 19th-century Asia. Ian lives in Cambridgeshire Keith Durham lives in Northumberland. He has had a lifelong interest in the Vikings and their ships. René Chartrand has been senior curator with Canada's National Historic Sites for nearly three decades, he is now a freelance writer and historical consultant. He lives in Quebec.