It's hard to say anything about The Grapes of Wrath. It's grown far above criticism and has a life beyond itself in song, film and other books. It's so long since I read it that I half doubted whether I'd read it or just read about it. Once I started reading it passages stood out in my head like I'd only read them yesterday. Descriptions, paragraphs and events that couldn't have just come from watching the film or hearing a song.
Chapters change from a panoramic viewpoint to the particular experiences of the Joad family. Each serves to deepen our understanding of the other.