Ask HN: I need to learn about PR and Marketing, recommendations?

Hello HackerNews entrepreneurs, I'm after some lessons in PR and Marketing. I would really appreciate any recommendations for good resources (online) and books on the topic. I read the Burnt Out Bloggers guide to PR (recommended by Justin, Founder of Twitch in the Startup School Lectures), I need more knowledge!!! Thanks and Merry Christmas everyone. P.s. I think I will be getting a Kindle for Christmas :)