Completely unrelated, Sock Knitting Master Class by Ann Budd also arrived this week. I don't even knit socks very often, but this reference book seems like a must-have. Check out this table of contents:
This book includes great information on pretty much everything you'd need to know about sock knitting. Ann explains magic loop and knitting in the round on two circular needles. She covers so many kinds of toes and heels that your head will spin. In addition to all of this, there are more than a dozen designs demonstrating the techniques.
Asymmetrical Cables by Cookie ACrazy cool cotton yarn and a comprehensive sock book. Completely unrelated, but still good.