- Author: Al Kelley Ira Pohl
- Language: English
- Year: 1997
- Author: Al Kelley Ira Pohl
- Language: English
- Year: 1997
- Author: Al Kelley Ira Pohl
- Language: Italian
- Year: 2004
- Author: Al Kelley Ira Pohl
- Language: Italian
- Year: 2004
- Author: Al Kelley Ira Pohl
- Language: English
- Year: 2000