I need some help with HLSL. I need to know which one is the best, the best book about HLSL, essentially in the matter of DXSAS, I'm starting to use FX composer, but everything you program in this editor must have semantics and annotations and you must know about them (almost all of them) if wanna understand the examples provided by nVidia. HELP!!!

hmm, if you want to learn just hlsl, I guess you don`t need a book. download directX SDK, or take a look at msdn.com, there is everything about hlsl. but there are books about what to do with hlsl, shaderX or GPU gems series.