There has been data ("Scrum Master: Scrum Master Certification: PSM 1 Exam: & Product Backlog 21 Tips To Capture and Manage Requirements with Scrum (scrum master certification,scrum master, scrum, agile, agile scrum)") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Wed Oct 30 18:55:34 2019, so the data displayed here has been removed .