A couple of weeks ago I bought Sock Innovation: Knitting Techniques and Patterns for One-of-a Kind Socks by Cookie A and have just finished reading it.
The book is split into two parts, the first containing information on different cuff, toe and heel options, how to convert stitch patterns from stitch dictionaries so that they can be worked in the round, and how to adapt and place them to make successful socks. The second contains a selection of sock patterns.
I really like the way Cookie’s brain works. I find her explanations sensible and logical and I like her approach to design: a combination of form and function. I have already ear-marked a few of the sock patterns for knitting soon, and will definitely be using the first part of the book even more.