Book recommendations

Can anybody recommend a book for no-limit cash games. I excell at tournaments, but am mediocre at cash games.

Cash games actually are more straightforward, but I'm having difficulty adjusting. I've found the best books to be by 2 plus 2 publishing at least in tourney play.

The best advice I can give is to appeal to cash game guru Nathan Williams! He's organized a Christmas sale of his books (look for it on our site is your blog) It really helps you learn the cache !!!

How relevant are these books?