I'm still such knitting n00b, The book I use most often is a how-to book, with nice big pictures! I have problems remembering how to bind off, increase, etc. It's also got instructions for crotchet, embroidery, and tatting, but I haven't tried any of those things; I'm having too much fun with knitting. :-)
I still keep my howto books handy...I have an old one that has multicrafts in it, too..always useful things like that!