Book excerpt: Technical and Military Imperatives: A Radar History of World War II is a coherent account of the history of radar in the second World War. Although many books have been written on the early days of radar and its role in the war, this book is by far the most comprehensive, covering ground, air, and sea operations in all theatres of World War II. The author manages to synthesize a vast amount of material in a highly readable, informative, and enjoyable way. Of special interest is extensive new material about the development and use of radar by Germany, Japan, Russia, and Great British. The story is told without undue technical complexity, so that the book is accessible to specialists and nonspecialists alike.