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 Science of Self Empowerment by Gregg Braden
Who are we? Our extraordinary abilities. Human evolution by cooperation.
Margin of Trust. The Berkshire Business Model by Lawrence Cunningham and Stephanie Cuba
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.