- Author: Norbert Grün?Norbert GruenAuthor Record # 322985
- Legal Name: Grün, Norbert?Gruen, Norbert
- Language: German
- Note: Was 1990 living in Cologne, North Rhine-Westphalia, Germany, and in the years 1992/3 & 2004 in Kerpen, North Rhine-Westphalia, Germany
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Short Fiction Series Essays
- Letter (Perry Rhodan #1526) (1990)
- Letter (Perry Rhodan #961) (1991)
- Letter (Perry Rhodan #1561) (1991)
- Letter (Perry Rhodan #1002) (1992)
- Letter: Und noch einmal (1992)
- Letter (Perry Rhodan #1631) (1992)
- Letter (Perry Rhodan #1070/1071) (1993)
- Letter (Perry Rhodan #2324) (2006)
- Letter (Perry Rhodan #2358) (2006)