TOTW I&II are both worthwhile. Code offers a good deal of advice for the track and on bike control. However, I found Lee Parks Book, "Total Control: High-Performance Street Riding Techniques" to be much better written and more useful over all. Also another good read is David L. Hough's books "Proficient Motorcycling" to be about the absolute best book out there when we are talking real world riding situations and strategy. Not so much a riding technique book, but more of a street survival guide. Both are really good reading where Code's books, though full of information, tend to be more track biased and are just poorly written.
My .02, Read Lee Parks Book first, then Hugh's then you can read TOTW I&II.