- Author: Juul Jesper
- Language: Spanish
- Year: 2010
- Author: Juul Jesper
- Language: English
- Year: 2010
- Author: Juul Jesper
- Language: English
- Year: 2013
- Author: Juul Jesper, Kühn Annette
- Language: German
- Year: 2015
- Author: Julius Beltz GmbH, Co. KG, Juul Jesper
- Language: German
- Year: 2018
- Author: Juul Jesper
- Language: German
- Year: 2015
- Author: Claus Vester cc-live, Juul Jesper, Vester Claus, Voelchert Mathias
- Language: German
- Year: 2016
- Author: Juul Jesper
- Language: English
- Year: 2011