I fiiiiiinally got around to To Kill a Mockingbird last year and for the first half I kept thinking, "This is all right but Capote must've helped her with this, she never wrote anything else" and then by the last half I thought, "Oh Capote didn't write this at all." The fact that Harper Lee only wrote the one book just makes me love
Mockingbird more. She did start writing another book, realised it wasn't going to be anywhere near as good, and quit while she was ahead. There are a LOT of authors out there who could've really benefited from following her lead.
As for
Catcher in the Rye, I think you need to be fairly young, and I think you need to discover it for yourself. If someone gives it to you, or you've matured beyond a certain level, you're just going to find it pointless and annoying. But if you get it the right way at the right time, then it'll totally speak to you.
No, really, how *are* we defining classic? I want to add
The Stars My Destination by Alfred Bester. Absolutely hands-down the finest genre novel I have EVER read. He wrote it in the '50s, and it hasn't aged at all. Absolutely mind-blowing and HIGHLY recommended!