There has been data ("Scrum Master: Scrum Master Certification: PSM 1 Exam: & Agile Estimating & Planning 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 Sat Feb 15 09:14:48 2020, so the data displayed here has been removed .