PurpleGoldfishPurple Goldfish: How to Win Customers and Influence Word of Mouth is about differentiation via added value. Marketing to your existing customers via G.L.U.E. (Giving Little Unexpected Extras). The book focuses on the 12 ways to do the “little extras” to improve the customer experience. The end result is increased sales, happier customers, and positive word of mouth. It is the first book in the Purple Goldfish Series.