James Falkner is a leading writer on seventeenth- and eighteenth-century warfare James Falkner is a leading writer on seventeenth- and eighteenth-century warfare and he has made a special study of the War of the Spanish Succession and the military exploits of the 1st Duke of Marlborough. His book, Great and Glorious Days: Marlborough''s Battles 1704-1709, is one of the outstanding studies of the subject. His books include Blenheim 1704, Ramillies 1706, Marlborough Goes to War: Eyewitness Accounts 1702-1713, Marlborough''s Sieges, Marlborough\'s Battlefields, Fire Over the Rock: The Great Siege of Gibraltar 1779-1783, Marshal Vauban and the Defence of Louis XIVA's France and Marlborough's War Machine.