The knitter's book of handy patterns
Folk Hats by vikki square (AWESOME book if you love hats)
The SNB books
Encyclopedia of knitting
and i just got the best of knitter's magazine: scarves and shawls ( not a big hit with me, but it was christmas and it's a knitting book
And loads of magazines...
I also plan to get books by Elizabeth Zimmerman, Vogue Stitionaries, Vogue Knitter's Handbook and Vogue ultimate knitting book, Hollywood knits, knitter's companion, ...and various others lol my list is LONG.