Another good book if you're interested in actors/behaviour decomposition instead of data decomposition is: Object Design: Roles, Responsibilities, and Collabor

Another good book if you're interested in actors/behaviour decomposition instead of data decomposition is: Object Design: Roles, Responsibilities, and Collaborations and also https://www.amazon.com/Object-Thinking-Developer-Reference-David/dp/0735619654 https://www.amazon.com/Object-Thinking-Developer-Reference-D... Also David West Presentation https://www.youtube.com/watch?v=RdE-d_EhzmA https://www.youtube.com/watch?v=RdE-d_EhzmA