In the 90s Scrum was developed, and in the last 15 years we have developed Agile Portfolio Management (APfM). This APfM guide, indebted to the Scrum guide by Ken Schwaber & Jeff Sutherland, emphasizes that Agile teams and APfM teams share the same theory and philosophy. The guide describes the APfM framework without going into specific methods, techniques and tools, because their success is context-dependent. While formulating goals is recognized as important, the guide does not describe how these goals are formulated. APfM exists as a whole and functions well as a container for other techniques, methodologies and practices. The purpose of this guide is to share understanding, improve APfM implementation and receive feedback from communities of practice. Periodic updates, fueled by user experiences, are actively shared in the communities, with authors Martin Vodegel & Rini van Solingen evolving this APfM guide with input from those practicing Agile Portfolio Management.