I have 4 books, Looking for Number 5...

[No Fizzle]

I own (and have read, in order):
HOH 1
HOH 2
SSHE (Miller, Sklansky, Malmuth)
NLHE Theory and Practice


I'm looking to be as well-rounded as I can, tourney and cash games. I play online only, PL and NLHE. I'm looking for recommendations on a 5th book that would help me become a more "complete" player and maybe fill in some of the gaps that the above 4 either do not cover, or do not cover in enough depth. Any input would be greatly appreciated, especially from the more experienced online players. Thanks in advance.