- Author: Michael Morris
- Language: German
- Year: 2023
- Author: Michael Morris, Valerie Auserehl Kelly, Ron J. Kopicki, Derek Byerlee
- Language: English
- Year: 2006
- Author: Jeff Morris, Michael Morris
- Language: English
- Year: 2010
- Author: Michael Morris
- Language: English
- Year: 2015
- Author: Michael Morris
- Language: German
- Year: 2015
- Author: Michael Morris
- Language: German
- Year: 2017