Check out the article section. Both F Paulson (Hold 'Em Poker for he Advanced Player) and Real Big Fish (Doyle's Super System 2) have reviews there in addition to all the great reading in the articles themselves.
I picked up a WPT companion series (Shuffle Up and Deal, and Making the Final Table) a month or so ago since I just started playing really in September. So far, there have ben some very good tips in there; perhpas I will write up a review of my own when I finish.
One of my favorites are "You don't have to be the world's greatest poker player, just a little better than most of your opponents at the table." It echos the advice of many on this site to play at a low stakes table until you consistantly win at that level. Another is "Poker is about making correct decisions." I like that because it gives me, the player, back the power..... it is not he other player's fault, the card's fault or the dealer's fault if I win or lose....... it is all up to me depending on the decisions I make.
I also have a couple others to read during downtime this next trip to Vegas and over the holidays: Get the Edge at Low Limit Texas Hold'Em; from the Kitchen to the Card Room by Bill Burton and Internet Poker by Lou Krieger and Kathleen Keller Watterson.
Just started Schoonmakers "Psychologie of Poker" , a book telling yo7u wich styles there are ( aggressive , loose , passiv etc. ) wich style you play and why you play the style you play and how to play som1 that plays a certain style .
Cant say much tough i just read about 20 sites yet but it sounds pretty useful .
For low limit it has to be Winning Low Limit Holdem by Lee Jones. I was recommended it by lots of players and I must say it is very comprehensive without being overly complicated. I love it and my bankroll is finally beginning to show the fruits of my labour!