In reply to Mountain Spirit:
Yep, The All Mountain Skier is a great book. I got mine on recommendation about 12 years ago after my 3rd of 4th week and found useful advice and drills in it right away. I've since skied about another 250 days and I'm still finding it useful.
One not to get is 'Inner Skiing' which I reckon was written by a snake oil salesman who has probably never been up a mountain.