Nigel Thomas PhD is a Senior Lecturer in charge of the Business Language Unit at the University of Northumbria, Newcastle, whose interests include 20th century military and civil uniformed organisations, with an emphasis on Germany, Central and Eastern Europe. His work for Osprey includes a five-part series on the German Army 1939-45. Carlos Caballero Jurado was born in Spain in 1957, and served as an NCO in the Spanish Army before graduating with a BA in History from the University of Alicante. He has contributed to four Osprey titles and has written several other books and articles on military historical subjects. A history teacher in Alicante, he enjoys travel and is a keen climber and skier.