Core Practices

Succeeding with Agile by Mike Cohn

Agile Estimating and Planning by Mike Cohn

Essential Scrum by Kenneth S. Rubin

Scrum: The Art of Doing Twice the Work in Half the Time by Jeff & JJ Sutherland

Kanban by David Anderson

Lean

The Toyota Way by Jeffrey Liker

The Lean Startup by Eric Ries

Lean Software Development: An Agile Toolkit by Mary and Tom Poppendieck

The Principles of Product Development Flow by Donald G. Reinersten

Implementing Lean Software Development by Mary and Tom Poppendieck

Leadership

Management 3.0 by Jurgen Appelo

How to Change the World: Change Management 3.0 by Jurgen Appelo

Lean Change Management by Jason Little

Behind Close Doors: Secrets of Great Management

The Phoenix Project by Gene Kim and Kevin Behr

Other Topics

Extreme Programming by Kent Beck

Coaching Agile Team by Lyssa Adkins

Crucial Conversations by Kelly Patterson

Agile Coaching by Rachel Davies and Liz Sedley

Agile Testing by Lisa Crispin and Janet Gregory

Product Owner

1. Agile Product Management with Scrum by Roman Pichler

2. www.romanpichler.com

3. Scrum Product Ownership by Bob Galen

4. Agile Product Ownership in a Nutshell by Henrik Kniberg

5. Scrum Alliance CSPO 

6. The 18 Chacteristics of a Great Product Owner by Barry Overeem

7. Jeff Patton's Story Mapping

Scrum Master

1. Scrum Guide

2. The Professional Scrum Master's Handbook by Stacia Viscardi

3. Scrum Master checklist by Michael James

4. The Scrum Master - How to Develop a Team by Marcel Van Hove

5. Charactersitics of a Great Scrum Master by Barry Overeem

6. Scrum Alliance CSM

7. Agile Retrospectives Toolbox by Ben Linders

Team

1. Scrum Reference Card by Michael James

2. Extreme Programming Explained by Kent Beck

3. Continuous Delivery

4. Chacteristics of a Great Scrum Team

5. lisacrispin.com

6. www.martinfowler.com

7. Scrum Alliance CSD