Unique single purchases of products with operating margins lower than the cost of acquiring a new customer, and high negative externalities (pollution,...) is a dead business model. E-cosystems will be the new way of selling goods, services and experiences in the future. Therefore companies need to open their value chain to some partners and partially to customers; allowing them to enter the value chain and crossing it with their own customer journey. This will allow retailers and brands to integrate the customer in the 3 moments of truth of any purchase: Action, Interaction, Transaction. The new ways of retailing and branding are explicitly developed in the book «E-cosystems» with pictures and examples of retailers and brands to better understand the impact of the new consumption and digitization on the retail. The author also developed an econometric formula for commercial E-cosystems based on biomimicry: by integrating small companies in the ecosystem of big corporates, a higher value creation is possible...only on certain conditions. Biological ecosystems are frail and have a slow pace of growth of 2%, can only survive within a clear relationship of species, and fully reuse every waste material into new raw materials,...the exact same rules of our new consumer society. Many thanks to Daniël Ropers, Dirk Huylebroeck, professor of applied mathematics, and Arnoldo Hax, Professor of Strategy at MIT (Boston) for helping, inspiring and co-working.