Jonah is a Marketing Professor at the Wharton School at the University of Pennsylvania and a world-renowned expert on word of mouth, social influence, and how products, ideas, and behaviors catch on. His first book, Contagious: Why Things Catch On was a New York Times and Wall Street Journal bestseller and his new book Invisible Influence comes out in June. Sponsors: eVoice: See how eVoice can help you connect with your prospects, partners, and customers quickly and easily! eVoice is offering Fire Nation an extended, 60 day free trial - just visit eVoice.com and use promo code FIRE! Franchise Help: You can own your own business without having to go it alone. Visit FranchiseHelp.com/fire to take a franchise quiz and find your next business!