Recommendations for marketing books.

http://www.amazon.com/exec/obidos/tg/detail/-/0738204315/ is a good read. It hasn't aged well -- there is more than a little tech bubble giddiness and fervor -- but it makes a lot of very important points about audience and marketing-as-conversation.

I like the 22 Laws of Marketing. There was also a book I once read by some guy who runs mail-order bulk postal-mail crapfloods. He came across as a complete asshole, but he had some good ideas. Alas, I forget the name. Print quality of the book looked like he ran it out of a gestetner. Cheap scammer, I'm sure, but one who knows how to make a quick buck...

http://www.amazon.com/exec/obidos/tg/detail/-/0071359168, by Ries and Trout, is a classic and justly so.

http://www.sethgodin.com/purple/ is one that's been doing the rounds lately to (reasonably) good press. I would personally recommend books that are more vague like http://www.businessknowhow.com/manage/clientslove.htm rather than strategy books. For the smaller business or consultancy, however, http://www.getclientsnow.com/ is a rather strategic 'how to' book which is handy.