[mcgin]

+1 for sklanskys stuff, particularly his Theory of Poker book

[sokoloff]

His "Fundamental Theorem of Poker" was mind-blowing to me when I first read it.

I like most of what he's written, so just to whet some appetites, I'll link to the FToP overview: https://en.wikipedia.org/wiki/Fundamental_theorem_of_poker