And it's this one. I tend to find that her other books tend to veer either too mystery magical (she calls non knitters 'muggles' and she's had a book dedicated to thoughts about knitting with pithy verse) or too 'watch me be funny' but the knitting rules is a good balance and in addition to that, she shares wisdom re: knitting pi shawls, socks, et al to the point where I'll just pick up the book just to read the odd chapter or five.
I have one yarn harlot book