B. H. Liddell Hart believes that "thought working on thought is the most influential process in history. Yet, being intangible, it is less perceptible than the effects of action, and has always received far less attention than it deserves." In THE GHOST OF NAPOLEON, Liddell Hart concentrates on two of these intellections, each of which vitally affected the course of history in the last two centuries. One was responsible for the triumphs of Revolutionary France and for Napoleon's empire; the other, for that ruinous conflict called WW I. Liddell Hart is to military subjects what Peter Drucker is to business. Two of his best are THE SOVIET ARMY and GREAT CAPTAINS UNVEILED.