Chapter 1. Mafia and Organised Crime: the Spectrum and the Models -- Chapter 2. Case Study 1 - Italy & the Structure Model -- Chapter 3. Case Study 2 - United States of America & the Enterprise Model -- Chapter 4. Case Study 3 - Australia & the Visibility Model -- Chapter 5. Case Study 4 - United Kingdom & the Activity Model -- Chapter 6. Convergences and Divergences across the Four Models -- C…