- Author: Jörg Frey, Wayne Coppins, Simon Gathercole, Christoph Heilig, Christoph Heilig
- Language: English
- Year: 2018
- Author: Christoph Heilig
- Language: German
- Year: 2020
- Author: Michael Wolter, Christoph Heilig, Wayne Coppins
- Language: English
- Year: 2017