Mikael Krogerus is an editor at Das Magazin, the cultural supplement of four of Switzerland's leading newspapers. Roman Tschäppeler is the founder and CEO of guzo, a communication agency based in Biel, Switzerland. Together, they are the authors of an internationally bestselling series of smart-thinking books, including The Decision Book, The Change Book and The Test Book.
Mikael Krogerus is an editor at Das Magazin, the cultural supplement of four of Switzerland's leading newspapers. Roman Tschäppeler is the founder and CEO of guzo, a communication agency based in Biel, Switzerland. Together, they are the authors of an internationally bestselling series of smart-t...