I need a miracle!

Deadhead cultural references aside, I’m looking for a book. I don’t know who wrote it, I don’t know what it’s called and I don’t know what it’s about. All I remember is that there is a passage where a guy is describing another character (who I think is a girl), in reference to a letter she writes. She doesn’t capitlize any word, including her name, because ‘she’s not a capitalist’.

So if anyone has any idea of which book this might be, please let me know. (Because I know with clues like that one, this should be easy!)