Peter Jacobs’ impressively researched account will engross students of the air war in Europe with two parallel tracks: first, the evolution of each side’s strategies and tactics and second, perhaps even more fascinatingly, the desperate technological race that ensued between Bomber Command, as it tried to find its targets in the dark, and the Luftwaffe’s Nachtjagd, as it in turn tried to find and destroy the intruding British bombers.