Attack Alarm

Summer, 1940. The skies above Britain are criss-crossed with the white scars of dog-fights as fighter pilots clash with the merciless German Luftwaffe. But one air defence gunner suspects the greatest threat to his country's safety might not come from the air, but from a secret plot now unfolding around him on the ground. But can he convince anyone to listen to his fears? Will they hear him in time? "Begins in August 1940 at the start of the Blitz. The mass-formation attacks have started, and the call to action stations - "attack alarms" is a daily occurence. This novel offers an account of that long summer when only a handful of fighter planes could prevent a British defeat." from https://www.fantasticfiction.com/i/hammond-innes/attack-alarm.htm