There has been data ("Agile Product Management: Scrum Master Certification: PSM 1 Exam Preparation & Agile: The Complete Overview of Agile Principles and Practices (scrum ... development, agile software development)") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Wed Oct 30 18:59:13 2019, so the data displayed here has been removed .