Going further - how many great (or at least enjoyable) books or films are the ruminations and self-analysis of a lone individual? Camus' L'Etranger almost quali

Going further - how many great (or at least enjoyable) books or films are the ruminations and self-analysis of a lone individual? Camus' L'Etranger almost qualifies, except it depicts events involving multiple people, even if it never speculates on the motivations of the other characters. Honesty is not enough. I think Blow is more naive than he, or indeed this reporter, realizes.