Students of technological and doctrinal change in war inevitably turn to the interwar period. Rarely have the implements of war evolved so rapidly, and rarely have so many talented soldiers grappled with the implications of those changes. The authors, both professors at Air University at Maxwell Air Force Base, have assembled a Who's Who of period scholars who also understand the contemporary relevance of their work. Dennis Showalter's brilliant summary essay, "Military Innovation and the Whig Perspective of History," is by itself worth the price of admission. Examining with a critical eye the notion that innovation is an obvious and easily judged phenomenon, the book is well worth reading for any student or advocate of organizational and doctrinal change.