The Sky on Fire: The First Battle of Britain, 1917-1918 by Raymond H. Fredette

The air war of World War I.

The bombing of London, the difficulties of the Germans in fielding aircraft and training (night flying was regarded as just crazy), the bombings, the diverting of British forces and equipment for defense, the incendiary bomb that wasn't used, and the future history of what was a minor part of WWI.