Looking for books that make heavy use of dialect in dialogue

I am a researcher who primarily works with dialects in the real world, but lately I've been interested in how dialect is used in literature as a reflection of the way we view other people. I want to read some books that have been written in the last 50 years (but it's ok if they are historical fiction) because I want to see how modern authors use dialect as a rhetorical device. I would prefer dialects from the US or the UK since I'm most familiar with that cultural context, but I'm open to anything.

I would love it especially if the book uses dialect as a primary mode of characterization, so both the other characters and readers are expected to draw assumptions about the characters from the way they speak. Authors that are both in the dialect community and not in the dialect community are welcome.

Books I have already looked into are most of the classics: Huckleberry Finn, The Color Purple, Blood Meridian, Trainspotting, Their Eyes Were Watching God. I'm looking for something that is less famous. Thanks in advance!