J.E. Kaufmann is a retired teacher and presently an adjunct professor at Palo Alto Jr. College and H.W. Kaufmann, PhD, is a retired professor, and they live in the United States. Their most recent books on fortifications are The Maginot Line, The Atlantic Wall, The Forts and Fortifications of Europe 1815-1945: The Central States, The Forts and Fortifications of Europe 1815-1945: The Neutral States, Verdun 1916: The Renaissance of the Fortress, Castrum to Castle: Classical to Medieval Fortifications in the Lands of the Western Roman Empire and Castle to Fortress: Medieval to Renaissance Fortifications in the Lands of the Former Western Roman Empire.
This book does offer the modeller both photographic views of various defensive structures, which is further assisted with cut through plans showing the structures in a manner that the modeller could replicate. -- Armorama