- Author: Nick Baker, Koen Steemers
- Language: English
- Year: 2002
- Author: Nick Baker Koen Steemers
- Language: English
- Year: 2019
- Author: Nick Baker Koen Steemers
- Language: English
- Year: 2019
- Author: Koen Steemers
- Language: English
- Year: 2004
- Author: Nick Baker Koen Steemers
- Language: English
- Year: 2000