"Making the Final Table" is a terrific book and for me is up there with HOH. It's shorter than HOH but has great value for 3 reasons:

1) Shows you how to LAG it up while not being reckless

2) Shows you how to play post-flop better. Specifically, making logic deductions from an opponents' bet preflop to his bets postflop. It shows you when to conclude that an opponent's bet postflop makes no sense when the baord doesn't fit his preflop raise.

3) The Appendix: Matt Maros sections.