Since I was asked by a customer for a recommendation of books worth buying for company library I thought I will share it here too 
Books about BPM in general
Fundamentals of Business Process Management (by Marlon Dumas, Marcello La Rosa, Jan Mendling, Hajo A. Reijers)
Reimagining Management (by Roger Tregear)
Business Process Change: A Business Process Management Guide for Managers and Process Professionals 4th Edition (by Paul Harmon)
Books about process modeling with BPMN
BPMN Quick and Easy Using Method and Style: Process Mapping Guidelines and Examples Using the Business Process Modeling Standard (by Bruce Silver)
Real-Life BPMN (4th edition): Includes an introduction to DMN (by Jakob Freund and Bernd Rücker)
Books about change management
While those books do not cover process management directly, they can be very useful source of inspiration, interesting techniques and great stories you can use in your BPM initiatives.
Switch: How to Change Things When Change Is Hard (by Chip and Dan Heath)
Smarter Faster Better: The Transformative Power of Real Productivity (by Charles Duhigg)
Think Again: The Power of Knowing What You Don’t Know (by Adam Grant)
I just finished reading this one and have to say it is very inspiring.
And last, but not least – something both for kids and adults:
Our Iceberg Is Melting: Changing and Succeeding Under Any Conditions (by John P. Kotter and Holger Rathgeber)
