The PMBOK Guide Series consists of textbooks published by the Project Management Institute (PMI). The "Guide to the Project Management Body of Knowledge" is a comprehensive text on project management, focusing on business and economics principles. It serves as a valuable resource for professionals looking to enhance their skills in project management. With 756 pages and authored by the Project Management Group, this trade paperback edition is a must-have for those interested in learning and applying project management methodologies in a practical context.