Born on 30th July 1960 in Bern, Switzerland

Marcus’ Rainbow Fish series of children's picture books, published since 1992, has been a worldwide success. The books have been translated into over 60 languages and have sold over 30 million copies.

He uses watercolors to illustrate his children's books. He begins by stretching the watercolor paper over a wooden board. Next, he copies his rough sketches onto the paper in pencil. He is then ready to begin painting. For his backgrounds and blended contours, he uses wet paint on wet paper; this achieves a softer effect. For the finer details, he first lets the painting dry, and then he paints the final picture layer by layer. When the illustration is complete, he cuts the paper from the wooden board.