A lot of pepole are looking for very specific ABC advice when they go looking for books, and HOH is really good for that. A lot of the concepts will extend to cash games (especially from vol1).
Really, I think if you are good with big picture concepts, then I think that
Theory of Poker is a great book. It uses examples from NL, limit and stud; but if you "get" them, is really useful. I was sorta thinking about re-reading it again. It was one of the earlier books I read, and I've been thinking about reading it again. Many people just want charts and rules, but it sounds like from your post that big picture stuff probably appeals/is useful to you.
Recently, someone referred "Winning in tough Hold'em games" to me, so I cashed in some FPP points to get it, and I've been reading it. It's pretty useful, but I found myself thinking that while the general concepts will not go away, it is sometime easy to get caught up on specific details that will evolve with the way the game plays (which I think changes over time). Anyway, this got me to thinking that maybe I should just go back to ToP and give it a quick read again.
Completely independent of any book -- download and play with
PokerStove. It's a good idea to understand where the math comes from, but when you are dealing with hand ranges it's way quicker to plug them into pokerstove; and it's good to have a familiarity with what the odds are with certain hand ranges. Sometimes the numbers are not what one might guess.
Ahh, a bit rambling (sorry) as I've been thinking about this lately...
