The great book for you is the book that has the most to say to you at the moment when you are reading. I do not mean the book that is most instructive, but the book that feeds your spirit. And that depends on your age, your experience, your psychological and spiritual need.
I keep telling myself to calm down, to take less of an interest in things and not to get so excited, but I still care a lot about liberty, freedom of speech and expression, and fairness in journalism.