The world ends. Your personal library is the only source of human knowledge. How does your society fare?

If abused, my books might breed little dictators. Robert Greene's compete works (48 Laws of Power, 33 Strategies of War, etc) would probably be applied literally to disastrous effect. I'd hope that the eastern philosophy and religion (specifically Tao teh Ching) would keep things mellow.

Besides a few survival and environmental books, society would be fucked in terms of practical things.