Proven customer engagement approaches for winning in the most important moments driving profitability and growth-customer retention and expansion Industry analysts report that up 70- 80% of business growth comes from existing customers. So why are you still investing mainly in attracting new customers? And, leaving renewals and upsells to chance? Or, worse yet, using a one-size-fits all approach to acquisition as you do for expansions? The Expansion Sale provides everything you need to seize the competitive edge in the customer-success space. Authors Erik Peterson and Tim Riesterer explain how the buying psychology of existing customers differs from that of new customers, and show how to adapt