Or try Super System 2

Super System (or consider the new Super System 2)
Doyle Brunson

Super System is considered the Bible of poker by many. It was, when it was first written, groundbreaking and is still considered to be one of the best books ever written on no limit Texas Holdem. Some of the book is outdated, with references to antes in regular Holdem, but despite this it is a must read for advanced poker players.  Super System 2 promises to be an updated version and a must have for any poker player.

Tournament Poker
David Sklansky

If you are an advanced ring poker player wanting to break into tournaments this book will give you some pointers. David Sklansky is a legendary author of countless poker and gambling books. This book teaches some of the essential differences between ring and tournament poker.

Hold'Em Poker for Advanced Players
David Sklansky, Mason Malmuth

This popular books covers some of the most advanced concepts of Texas Holdem. Written by some well respected poker players, you'll certainly learn something from this book no matter how advanced you are.

Caro's Book Of Poker Tells
Mike Caro

If you don't yet have this book in your collection you need to get it. If nothing else you can amuse yourself by laughing at the 70s fashion and men with long hair and beards playing poker. But perhaps more useful than the fashion faux pas is the insights Mike Caro has on the psychology and body language of poker. This is a must read.

The Psychology of Poker
Alan N. Schoonmaker

As an advanced player you should not need to be reminded that poker is a game about people as opposed to a game about cards. This book attempts to delve into the psychology of poker players and offer insight that allows you to view the game from a different angle. Worth a look.

Harrington On Hold'em Vol 1
Dan Harrington

This is the first of two books written by poker pro Dan Harrington.  The full title of the book is Harrington On Hold'em - Expert Stratergy For No Limit Hold'em Tournaments: Strategic Play.  Quite a mouthfull but certainly a book any poker player should read.  Harrington's writing style is simple and straightforward, he explaines nuances of the game in a very easy to understand format which makes this one of the most valuable poker books out there.  Highly recommended.

Harrington On Hold'em Vol 2
Dan Harrington

This book picks up where the previous book leaves off.  The full title of this book is Harrington on Hold'em Expert Strategy for No Limit Tournaments: Endgame.  The brilliant insight into the game continues and if you've read the first book this is a must read.  If you really want to take your tournament game to the next level then these two books are a must read.