So, I will kick it off...
Maybe not as people were pretty quick to post while i was writing this!
If I was asked to recommend ONE Poker book, my vote would go to 'Every Hand Revealed' by Gus Hansen.
Basically, Gus had a small digital recorder with him at the 2007 Aussie Millions (which he won) and took notes on each and every hand played, including stack sizes, positions etc. While not every hand is in the book the vast majority of them are. Its not a poker manual in the style of Harrington etc, but it is unique in giving extremely good insight into the thinking and mindset of a seasoned Pro.
A lot of people see Gus make seemingly impossble calls on TV, and think he just gets lucky, but after reading the book, you will know thats just not true...
And he's (sometimes brutally) honest, describing his play in one particular hand (and I quote) "I played this hand like a novice, a fish, an idiot!"
And for those who think Gus is an 'any 2 rags will do' kind of player: He actually lays down BigSlick preflop! Twice!
As one 'official review' of the book said: "Many people watching Gus play on TV say 'What the hell is he thinking?!' and after reading this book the answer is most certainly 'A hell of a lot!'"
The book is laid out in a great format: 1 chapter per day of play and 3 chapters for the Final Table: 7-3 players, 3handed and HU with an intro as to how he approaches each stage of the tournament and a recap of the day at the end of each chapter.
He does talk some pretty advanced strategy and poker logic, and imho this is a must read for anyone wanting to play serious tournament poker.
Finally, I have to say, some of the plays he pulls off MUST be because of his image... I can't imagine your average unknown (but pro) player pulling off some of his moves, but he still explains his logic and thinking behind the move. In one instance he calls an opponents push over his flop bet, purely based on what folding would have done to his table image! (sure he had him outstacked by something like 8:1, but hey...)
And on top of all that, its about a local tourney!
I've read it maybe 4 times now, and get somethin more out of it each time.
Enjoy...