I haven't read it yet, but I bet Barry Greenstein's book will be a good one for improving your live game. It is supposed to be full of anecdotes and information on how to stay sharp and be successful. You see, where it concerns sound poker strategy, which is in almost all of the more popular and widely read books, the difference between live cash games, tournaments, and internet play isn't all that huge. Once you have the basics and can use them successfully, you are well on your way to being good at any form of poker. To specialize in a certain discipline such as tournaments, you should look for a book by a tournament success story such as Dan Harrington's new books.
It is for the above reason that I suggested Greenstein's book before even reading it. Barry is a cash game specialist and has been able to sustain playing in the highest limit games in many different types of poker. He's insanely good at cash game play. He also isn't too shabby on the tournament circut either. According to BG, his book has a lot of material that isn't particularly poker specific, but it all has a certain aspect of poker related personal improvement within it. It sounds really interesting, and I shall be buying it soon myself. I have about 4 brand new books collecting dust as I type this that I still have yet to start and I swore to my wife I wouldn't buy any more until I actually started reading the ones I have, lol.
I will probably get flamed for this, because he isn't a great cash game player, but Phil Hellmuth's Play Poker Like the Pros is a really good book and a fairly easy read.
Super System II is also a great book, but it is more an in depth informational book than anything else, and can be a bit of a tough read.
Super system 2, and Harrington on Hold'em. Two great books and if you ask people who read these books they will say the same. If you need any assistance on what book you are looking at I would be gladly to tell you if the book is good or not. I read all of the poker books.
greenstiens book is amazing he tells you about the weakness in checkraising and reasons to play certain hands. the down side is he didn't help much with my live game as he preaches patience and i only play the top 10 hands really live so good material in short but leave it alone if you play tight any way