Hilary Louis Doyle, is an expert on German armoured vehicles and has written numerous books on AFV's including the Encyclopaedia of German Tanks. Hilary lives in Dublin, Ireland, with his wife and three children. Tom Jentz, born in 1946, is one of the world's leading AFV researchers and is best known for the Encyclopaedia of German Tanks. Tom lives in Maryland with his German wife and two children.