Books, which continue to inspire me:
Inside the Change, Adriaan Bekman
Some of the tools and concepts of IMO, especially the seven basic group exercises.
The Culture Code by Daniel Boyle
Lots of new observations and ideas how to build successful teams.
The Way of the Seal by Mark Divine
How to deal with your emotions, and many other practical tips for successful teams.
Berkshire beyond Buffet, Lawrence Cunningham
How Warren Buffet owns over 100 companies, which he never will sell again. A plead for buying and keeping companies forever.
Philosophy of Spiritual Activity, Rudolf Steiner
For me the most important book about thinking with the heart.