- Author: Rien Poortvliet Author Record # 9622
- Legal Name: Poortvliet, Marius Harm
- Birthplace: Schiedam, South Holland, Netherlands
- Birthdate: 7 August 1932
- Deathdate: 15 September 1995
- Language: Dutch
- Webpages: IMDB, Wikipedia-EN
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Cover Art
- Door wolven opgevoed (1965)
- De Triffids komen (1967)
- Leven en werken van de kabouter (1976)
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Gnomes [English] (1977)
also appeared as:
- Translation: Das große Buch der Heinzelmännchen [German] (1978)
-
De oproep der kabouters (1981)
also appeared as:
- Translation: Secrets of the Gnomes [English] (1982)
- Secrets of the Gnomes [English] (1984)
- The Book of the Sandman and the Alphabet of Sleep [English] (1989)
- The Macbeth Prophecy [English] (1997)
- Das große Buch der Heinzelmännchen [German] (2012)
- Leven en werken van de kabouter (1976)
- Gnomes [English] (1977)
- Das große Buch der Heinzelmännchen [German] (1978)
- De oproep der kabouters (1981)
- Secrets of the Gnomes [English] (1982)
- The Book of the Sandman and the Alphabet of Sleep [English] (1989)