literature

OK, I know someone will tell me that there is already a thread for this, so save your energy.
I'm looking for opinions on poker books. I have read "Theory of poker", "Super system 2", and 1 of Harringtons (can't remember which one). I haven't heard much about Negreanu's book, but would like to read it. Any other suggestions?

Hmm, my favorite books are All the Dan Harrington books, Ace on the River, Little Green Book, Caro's Book of Poker Tells, Bluffing Beyond Poker, and David Slanskys Tournament for Advanced Players.