This is a great, annotated list. http://wexfordpress.com/tex/shortlist.pdf
From the 15 or so books I've read on publishing/marketing, I've found that each new book I read gives me many valuable insights. It's not like you read one book and then the next is simply saying the same thing in different words. There's a lot to learn, and I'm glad for all the reading I've done on publishing and marketing.