«The most comprehensive self-study tool for developing leaders I have read so far. It is a brilliant concept. I wish I had a book like this when I started my leadership career.»
M.E. (Maurice) Bakker MBA, CEO, ABC Management Groep B.V.
«Kai Roer manages to give great advices in a very simple format, really a Workbook, which deserves to be read more than once.»
Filipe Carrera, International Trainer and Speaker
«A must for every leader.»
An Deventer, Internal Auditor at KBC Global Services NV