What are some of the BEST Holdem books?

Hello! New to the site and this is my first post. I have a couple of holdem books (super system) and the other is not worth bringing up. I want to start reading more books and would like to know which ones are worth buying. Thanks in advance and good luck with your game!

Full TIlt has an excellent poker strategy Guide. Edited by Michael Craig. A wonderful compendium of writers you generally dont get to read. Huck Seed, Mike Matusow, Gavin Smith, etc.
Also I like the 3 books by Phil Gordon. The Little Black, Green, and Blue book. Fast easy reading and fun. It gives you a lot of basic info without making it academic. And some good reminders about handling yourself as a poker player.
Then there is always Sklansky if you want the scholarly read. But prepare to read this a couple times to get the gist of it. The Theory of Poker is a must have.
Always read Card Player.