Rereading Slaughterhouse-Five taught me two things about the novel: how great it really is, and what it’s really about. It’s not about time travel and flying saucers, it’s about PTSD. ....“He tried to remember how old he was, couldn’t.” This is Billy the optometrist. “He tried to remember what year it was. He couldn’t remember that, either.” For the traumatized soldier, the war is always present, and the present is always the war. He is unstuck in time in the sense that he is stuck in time. His life is not linear, but radiates instead from a single event like the spokes of a wheel. Everything feels like a dream: a very bad dream. The novel is framed the way it is because Vonnegut, too, was traveling in time. He needed to make himself a part of the story because he already was a part of the story.
- William Deresiewicz on Kurt Vonnegut