I have the Kindle version of Likeable Social Media: How to Delight Your Customers, Create an Irresistible Brand, and Be Generally Amazing on Facebook (& Other Social Networks), and I find that it speaks to the heart of social media: connecting.
Everyone will tell you, when it comes to social media, you have to be a real human being, someone people can identify and connect with. An endless stream of links and in your face selling will not get you anywhere.
Likeable Social Media lays it out for you in clear, concise language with plenty of examples and success stories. Highly recommended for anyone looking to be successful with social media marketing.