Who is the narrator, can she or he read minds, and, more importantly, can we trust her or him?
Third-Person Limited
The narrator knows everything about Jim Dixon, including all of his secret desires (women and booze) and dreams (to not have to put up with Professor Welch). But when it comes to other characters, the narrator doesn't tend to let us in on what's going on. He's always showing us the world from Jim's point of view. And Jim is an intensely observant guy—he notices everything about people's appearances, voices, and accents. So we spend a lot of time inside Jim's head and his rich personal fantasy world. In limiting his perspective to Jim Dixon, Amis allows us to have sympathy for a guy who, a lot of the time, acts like an insensitive, drunken jerk. In Amis's narration, we get to see the inner thoughts and feelings behind those behaviors.