Thanks Harlan et al, there's plenty more here for me to check out that I wasn't aware of -- it's much appreciated!

On my marketing list, I'd definitely include Influence: Science and Practice by Robert Cialdini -- for psychology that relates to marketing as well as sales and copy.

I'd also include Why We Buy -- The Science of Shopping by Paco Underhill in a long book list, although it wouldn't be in my top 10. I think this is good to at least highlight how many factors are involved in retail buying (outside of copy) well beyond the influence of just getting someone to decide to purchase at a particular store.

Cheers,