Strongest Shall Survive- Bill Starr
Wrestling Physical Conditioning Encyclopedia- John Jesse
Tommy Kono's Oly book (forgot the title...)
Practical Programming for Strength Training- Rippetoe & Kilgore (SS, as well)
A lot of the heavy periodization books have only ben 'interesting' to me, as I've never been (or plan to be) at the level where things get that complex.