This book focuses on CEship, which is described as the process of exploring and exploiting opportunities in the circular economy domain (Zucchellaand Urban, 2019). In business terms, as the circular economy is considered a strategy to achieve sustainable outcomes (Geissdoerfer et al., 2020), CEship isa form of sustainable entrepreneurship. It includes interactions and collaboration with other actors in the ecosystem, regional governance and determinants,and technological resources (Suchek et al., 2022).Therefore, the transition towards the circular economy is strongly linked to collaborative relationships between stakeholders, whose main goal is to createand capture differential values (Bertassini et al., 2021). The level of development of a supportive environment for CEship plays a prominent role in shaping business ecosystems.