**Problem:** Sharing decreases in adulthood, leading to environmental issues such as overconsumption and growing social isolation. **Idea:** The Sharing Club was created to address these challenges. Its goal is to promote genuine sharing, reduce resource consumption, and strengthen social connections. A central element is the shareable book, which provides comprehensive information on the benefits of sharing. The book can be symbolically split in half and passed on to actively spread the concept of sharing. Through the shared use of resources and skills, the Sharing Club encourages sharing, reduces waste and overconsumption, and combats social isolation.