By Mathilde Stein. Published by Lemniscaat in 2014.
The illustrations for Boelies Kerstplan were made with gouache, acrylics and photoshop. Boelies Kerstplan is available at bol.com. And has been published in France as Le Noël de Boulie, and will be coming out in Germany as Rudi rettet Weihnachten, and in Denmark as Bertils Juleplan.