I am a 3-6 6 max player and am looking to cash in my FPP's on Poker Stars to get a book. I'm looking at either Small Stakes Hold Em, Hold Em For Advanced Players or Theory of Poker. My win-rate is 2.5-3bb/100 and am looking to improve enough to jump to 5-10. Any input would be greatly appreciated.

BTW, I only have enough points to get one book.