Here are the The 10 Essential Books about Marketing according Business Week: http://buswk.co/6yewql I'd add The 22 Immutable Laws of Marketing (Ries and Trout) and Enterprise One to One by Peppers and Rogers. And while it's not technically a book about Marketing I must give a shout out to REWORK by Jason Fried. What's on your list?
Great list Jim. Have one other on ROI of marketing and social media; ROI of Social Media / Wiley & Sons; Powell, Groves & Dimos (OK, it's mine, but the review have suggested it belongs on lists like this for marketers)