Willem Kuipers graduated from Delft University of Technology as a mathematical engineer, studied and practised management consultancy, and currently enjoys counselling extra intelligent adults on career choice and development of identity. He sings in a choir and designs and builds labyrinths. Pictures and articles on his labyrinth work can be found at his website www.willemlabyrint.nl. More information on the subject of this book can be found at www.ximension.com.