Reddit reviews Scrum Mastery: From Good To Great Servant-Leadership

https://www.amazon.com/Drive-Surprising-Truth-About-Motivates/dp/1594484805

https://www.amazon.com/Scrum-Mastery-Good-Great-Servant-Leadership/dp/0957587406

https://www.amazon.com/Lean-Software-Development-Agile-Toolkit/dp/0321150783/

https://www.amazon.com/Implementing-Lean-Software-Development-Concept/dp/0321437381/

https://www.amazon.com/Coaching-Agile-Teams-ScrumMasters-Addison-Wesley/dp/0321637704

https://www.amazon.com/Five-Dysfunctions-Team-Leadership-Fable/dp/0787960756/

https://www.amazon.com/Phoenix-Project-DevOps-Helping-Business/dp/0988262509/

https://www.amazon.com/Agile-Lean-Program-Management-Collaboration/dp/1943487073/

https://www.amazon.com/Tribal-Leadership-Leveraging-Thriving-Organization/dp/0061251321/

A great Scrum Master recognizes himself in the acronym made up by Geoff Watts, RE-TRAINED:

• Resourceful, is creative in removing impediments
  
• Enabling, is passionate about helping others
  
• Tactful, is diplomacy personified
  
• Respected, has a reputation for integrity
  
• Alternative, is prepared to promote a counter-culture
  
• Inspiring, generates enthusiasm and energy in others
  
• Nurturing, enjoys helping teams and individuals develop and grow
  
• Empathic, is sensitive to those around them
  
• Disruptive, breaks the status quo, help create a new way of working

I just finished my PSM II certification. This book is by far the best read you can get if you want to move beyond just being a "scrum nazi" and enforcing the rules of scrum in your organization. It was also the most recommended book from a recent Scrum.org training event I attended: https://www.amazon.com/Scrum-Mastery-Good-Great-Servant-Leadership/dp/0957587406