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.