Slaughterhouse-Five

Billy Pilgrim survives the firebombing of Dresden as a prisoner of war in an underground meat locker, then becomes unstuck in time, living his life out of order and periodically abducted to the planet Tralfamadore. Vonnegut was in that meat locker himself and spent twenty years failing to write the book directly. The science fiction is the workaround, and the flatness of so it goes is what carries the weight.