This document by SAP Press is a practical guide for ABAP developers who want to learn and develop on SAP NetWeaver PI. The guide provides step-by-step instructions, best practices, and examples to help ABAP developers understand the PI architecture and develop integrations effectively. It also covers topics like message mapping, adapters, and error handling. By following this guide, ABAP developers can enhance their skills and become proficient in developing integrations on SAP NetWeaver PI.