This book investigates value co-creation processes within the context of circular entrepreneurship. By rooting the book in value co-creation theory, the author addresses the following research questions: How do value co-creation processes impact organizations? And how could circular firms gain legitimacy through value co-creation processes? Through an empirical study based on interviews with circular entrepreneurs and focus groups involving both entrepreneurs and a sample of co-creating customers, the author offers an empirical framework of value co-creation processes and resulting organizational changes. The book is informative for both academics and practitioners. From a theoretical point of view, it contributes to value co-creation theory, the growing circular entrepreneurship literature, and organizational studies. From a managerial perspective, it informs aspiring circular entrepreneurs and managers about the potential of value co-creation processes in supporting their firms in gaining legitimacy and becoming learning organizations.