I just finished Discipline and Punish by Michel Foucault (really recommended), I´m currently reading Pensées by Blaise Pascal and I´m about to start White Nights by F. Dostoyevski

I would also add 1984 by George Orwell, I think it would be valuable for society as a whole to read it (even though many people would choose to lie to themselves and ignore the book´s meaning...it´s only valuable for those who truly want to listen to the message).