What book should I read next?

Here is a list of what I have read:
Hellmuth POS (Play poker like the pros)
Super system 1 and 2
Harrington on Holdem 1
Aces and Kings
Professor, Banker and Suicide King
Small Stakes Holdem
Theory of Poker
Caro's book of Tells

Reading now:
Harrington on Holdem 2
Holdem for Advanced Players

What do I need next? I am trying to focus on Limit Holdem and spend a little bit of time of NL.

I would like to get into some other games in about a year or so.

thanks for the help.