Poker Books to Buy...

[big city]

i have gotten four books since i have seriously gotten into playing No-Limit Hold em.

Super System - Brunson (haven't read yet, just got yesterday)
Hold Em Poker - Sklansky
Play Poker Like the Pros - Hellmuth
Ken Warren Teaches Texas Hold Em - Warren

let me know what other good ones are out there...i am wanting to pick up Caro's book on tells...

i also play maybe once a week 20 dollar buy in with .25/.50 blinds at college and have made over 320 dollars, that a pretty good pull in? also do any of you play in Casino Tournys? if so, how long have u been playing...thanks for your help