Darkness Falls from the Air by Nigel Balchin
With ostentatious lack of concern, Bill Sarratt, his wife and her lover spend the war wining and dining expensively, occasionally sauntering out into the Blitz with cheerful remarks about the shattered night-life of London's West End. But beneath the false insouciance lies the real strain of a war that has firmly wrapped them all in its embrace. Wit may crackle at the same pace as buildings burn, but personal tragedy lurks appallingly close at hand.