I've seen most of the books recommended above, and they are all quite good. The Adams and Rudman books may be the most available; the Thornton book has a lot of good, practical tips, but it is quite oriented to Thornton's style of doing things - maybe not yours. That's the problem with advanced printing books. Everyone has his own style of doing things. You need to explore several sources to adapt the information to your own style. Prowling used book stores can be a great source. I found an old book by Lootens last year that was outstanding.
Good advice and excellent reccomendations, thank you all.