SAFe Reference Guide: Scaled Agile Framework for Lean Enterprises
Dean Leffingwell
The Scrum Guide
Ken Schwaber
Handbook of Supply Chain Management, Second Edition
James B. Ayers
The Email Fortress - Secure your Inbox, Protect Your Privacy
Gavin Phillips
Agile ScrumMaster Exam Questions
Eddie Vi
Scrum: a Breathtakingly Brief and Agile Introduction
Chris Sims & Hillary Louise Johnson