Scrum and XP from theTrenches. How we do Scrum
Henrik Kniberg
The Scrum Guide
Ken Schwaber
Coaching Agile Teams: A Companion for ScrumMasters, Agile Coaches, ...
Lyssa Adkins
PMP® Examination Practice Questions
Sean Whitaker
Towards Non-Dominating Leadership: Aims and Methods of the Lumko ...
F. Lobinger
Radical Candor: Be a Kick-Ass Boss Without Losing Your Humanity
Kim Scott