In the Scrum Body of Knowledge you can read the complete theory about the Agile Scrum framework from A to Z. From the principles of Agile and Scrum, through the various Scrum roles to the details. Such as estimating project risks by Scrum Product Owners. And effectively organizing teams by Scrum Masters.
Fifth edition (2025)
This completely revised fifth edition (2025) also offers two additional chapters on scaling and applying Scrum for large projects and organizations.
The SBOK was developed as a guide for professionals and organizations who want to start applying Scrum and as a reference work for everyone who already does. It is based on Agile Scrum theory and the experiences gained in thousands of projects in all kinds of companies and organizations. Many Scrum experts have contributed to its creation.