Classics that aren’t sad and depressed?

I read fun books for enjoyment but I also read classics to educate myself. But all the classics I have read have been sad. I have read; crime and punishment, karamazov brothers, notes from undergroud, brave new world, island(aldous huxley), do androids dream of electric sheep. I liked most of them but almost all of them had something depressing. I still want to read classics but I am very emotional, what can I read that is not sad and depressed? Or should I give up on reading classics? Or how can I read sad and depressed stuff without feeling depressed? Thanks.