James Falkner is a leading authority on eighteenth-century warfare and he has made a special study of 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 other 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 XIV's France, Marlborough's War Machine and The War of the Spanish Succession, 1701-1714.