"Z.E.R.O.: Zero Paid Media as the New Marketing Model" by Joseph Jaffe and Maarten Albarda
"X: The Experience When Business Meets Design" by Brian Solis
"The Content Formula: Calculate the ROI of Content Marketing & Never Waste Money Again" by Michael Brenner and Liz Bedor
"Think Like a Rock Star: How to Create Social Media and Marketing Strategies that Turn Customers into Fans" by Mack Collier
Click here for the episode's show notes and links.