You probably didn't get any responses to your other post because it's hard to say what the 'best' sock book is.
Have you already made socks so you understand the basics? If not, I'd recommend a website first - Silver's tutorials. http://www.cometosilver.com/socks/
There are books that teach the different methods (dbl pt needles, magic loop, 2 circs), but there are websites w/tuts that teach them, too. Then there are top down or toe up. then there are different heel types.
Charlene Schurch's books, Sensational Knitted Socks and More Sensational Knitted Socks are both good books - lots of different stitch patterns, and top down and toe ups.
The sock book I'm after next is Wendy Johnsons Socks from the Toe Up. I've already bought Cookie A's book and Cat borhdi's latest, New Pathways.