Activiti 5.x Business Process Management Beginner's Guide (2014)
Chapter 1. Installing Activiti
Chapter 2. Modeling Using the Activiti Modeler
Chapter 3. Designing Your Process Using the Activiti Designer
Chapter 4. Management and Monitoring Using the Activiti Explorer
Chapter 5. Development Using the Process Engine
Chapter 6. The Activiti ProcessEngine API
Chapter 7. Working with the REST API
Chapter 8. Integrating Activiti with Third-party Services
Chapter 9. Implementing Advanced Workflows