These events are published by the Ordering context and subscribed to by other contexts, allowing them to react to changes.

With this new design, BookHub's platform is more scalable, maintainable, and adaptable to changing business needs. You've successfully applied Domain-Driven Design principles to create a robust and flexible e-commerce platform.

You can find more information on Domain-Driven Design in Eric Evans' book, which is available in various formats, including PDF.