Mikael Krogerus (Author) Mikael Krogerus is a Finnish journalist who works as an editor on
Switzerland's biggest weekly magazine Das Magazin. Roman Tsch¿eler (Author) Roman Tsch¿eler is
a creative producer based in Biel Switzerland who produces documentary movies ad campaigns
and art installations. Krogerus and Tsch¿eler met at school in Denmark and have written four
books together - The Question Book The Test Book The Change Book and the international
bestseller The Decision Book.
