Robbie Kellman Baxter is the author of The Membership Economy: Find Your Superusers, Master the Forever Transaction & Build Recurring Revenue (McGraw-Hill 2015), and The Forever Transaction: How to Build a Business So Compelling, Your Customers Will Never Want to Leave (McGraw-Hill 2020). Robbie’s expertise extends to include SaaS, media, consumer products and retail and community organizations. Her clients have included Microsoft, Fitbit and The Wall Street Journal.