Wim Rampen wrote a digital booklet compiling some of his most popular blog posts from the past three years on customer relationships. The booklet has four chapters. The first chapter discusses the concept of value, explaining that value is co-created between customers, firms, and other participants rather than added or provided by companies alone. The second, shorter chapter contains two posts expressing mixed views on the Net Promoter Score metric. The third chapter focuses on social CRM and customer relationship building in an age of service and co-creation. The last chapter brings together Rampen's thinking on service and marketing. Rampen sees the booklet as a way to get feedback on whether writing a full book makes sense.