- Author: Jan Gardemann Author Record # 148477
- Legal Name: Gardemann, Jan
- Birthplace: Eppendorf, Free Hanseatic City of Hamburg, West Germany
- Birthdate: 16 December 1961
- Language: German
- Webpages: bastei.de, jangardemann.de
- Used These Alternate Names: Janet Farell, Geoffrey Marks
- Author Tags: colonization (1), robots (1), crime (1)
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Novels
- Wurmlochfalle (2008)
- Die Seltsamen (2021)
- Pestmarie (2008) with Ernst Vlcek and Uwe Voehl [only as by Geoffrey Marks and Ernst Vlcek and Uwe Voehl]
- Jessica Bannister and the Midnight Séance [English] (2021) [only as by Janet Farell]
- Jessica Bannister and the Cursed Seas [English] (2021) [only as by Janet Farell]
- Jessica Bannister and the Ghosts of the Past [English] (2021) with Gordon Scott and unknown [only as by Janet Farell]
- Jessica Bannister and the Family Secrets [English] (2022) with Gordon Scott and unknown and Earl Warren [only as by Janet Farell]
- Die Rache des Puppenmachers (2007) with Christian Montillon and Peter Morlar [only as by Geoffrey Marks and Christian Montillon and Peter Morlar]
- Die Hexe am Lech (2007) with David Steinhart [only as by Geoffrey Marks and David Steinhart]
- Das schwarze Grimoire (2008) with Dennis Ehrhardt and Peter Morlar [only as by Geoffrey Marks and Peter Morlar and Dario Vandis]
- Baal (2009) with Dennis Ehrhardt and Uwe Voehl [only as by Geoffrey Marks and Dario Vandis and Uwe Voehl]
- Baal (2014) with Peter Morlar and Uwe Voehl [only as by Geoffrey Marks and Peter Morlar and Uwe Voehl]
- Die Missionen 81-90: Die Missionen der Raumflotte von Axarabor (2021) with Alfred Bekker and Hendrik M. Bekker and Wilfried A. Hary and Stefan Hensch and Hubert Hug and Allan J. Stark and Bernd Teuber [only as by Alfred Bekker and Konrad Carisi and Jan Gardemann and Wilfried A. Hary and Stefan Hensch and Hubert Hug and Allan J. Stark and Bernd Teuber]
- Die Missionen 101-110: Die Missionen der Raumflotte von Axarabor (2021) with Wilfried A. Hary and Roland Heller and Stefan Hensch and Hubert Hug and Antje Ippensen and Allan J. Stark and Bernd Teuber
- Nachts, wenn du die Geister rufst... (1996) [only as by Janet Farell]
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Das Geheimnis der "Schwarzen Krähe"?Das Geheimnis der "Schwarzen Kraehe"(1996) [only as by Janet Farell]
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Das Vermächtnis des Magiers?Das Vermaechtnis des Magiers(1997) [only as by Janet Farell]
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Wo die Wölfe heulen...?Wo die Woelfe heulen...(1997) [only as by Janet Farell]
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Jessica und der Geistermönch?Jessica und der Geistermoench(1997) [only as by Janet Farell]
- Die Verfluchten der Meere (1997) [only as by Janet Farell]
- Die Insel der Gespenster (1997) [only as by Janet Farell]
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Im Bann des grünen Phantoms?Im Bann des gruenen Phantoms(1997) [only as by Janet Farell]
- Sie sah ihren Tod voraus (1997) [only as by Janet Farell]
- Die Burg der verlorenen Frauen (1997) [only as by Janet Farell]
- Spuk in der alten Gormic-Villa (1998) [only as by Janet Farell]
- Der Testflug der Ukuqubuka (2019)
- Der erste Kaiser von Aximov (2019)
- Nachts, wenn du die Geister rufst... (1996) [only as by Janet Farell]
-
Das Geheimnis der "Schwarzen Krähe"?Das Geheimnis der "Schwarzen Kraehe"(1996) [only as by Janet Farell]
-
Das Vermächtnis des Magiers?Das Vermaechtnis des Magiers(1997) [only as by Janet Farell]
-
Wo die Wölfe heulen...?Wo die Woelfe heulen...(1997) [only as by Janet Farell]
-
Jessica und der Geistermönch?Jessica und der Geistermoench(1997) [only as by Janet Farell]
- Die Verfluchten der Meere (1997) [only as by Janet Farell]
- Die Insel der Gespenster (1997) [only as by Janet Farell]
- Im Bann des grünen Phantoms (1997) [only as by Janet Farell]
- Sie sah ihren Tod voraus (1997) [only as by Janet Farell]
- Die Burg der verlorenen Frauen (1997) [only as by Janet Farell]
- Spuk in der alten Gormic-Villa (1998) [only as by Janet Farell]
- Therapie (2003)
- Wohnzimmerkrieger (2003)
- Case Modding (2004)
- Ein Abschiedsgeschenk von der Erde (2004)
- Jäger der Nacht (2005) [only as by Geoffrey Marks]
- Geschichtsstunde für Marsianer (2006)
- Die Tränen der Engel (2007) [only as by Geoffrey Marks]
- Das Kastell der Qualen (2007) [only as by Geoffrey Marks]
-
Der Dämon von Madagaskar?Der Daemon von Madagaskar(2007) [only as by Geoffrey Marks]
- Ein ganz normaler Tag auf dem Nuklearschiff Otto Hahn (2008)
- Das magische Geflecht (2008) with Ernst Vlcek and Uwe Voehl [only as by Geoffrey Marks and Ernst Vlcek and Uwe Voehl]
- Das Pestbalg (2008) with Dennis Ehrhardt [only as by Geoffrey Marks and Dario Vandis]
- Der schwarze Augustin (2008) with Ernst Vlcek and Uwe Voehl [only as by Geoffrey Marks and Ernst Vlcek and Uwe Voehl]
- Pestmarie (2008) with Ernst Vlcek and Uwe Voehl [only as by Geoffrey Marks and Ernst Vlcek and Uwe Voehl]
- Der Fliegenkult (2009) [only as by Geoffrey Marks]
-
Techne (2009)
only appeared as:
- Serializations:
- Techne (part 1 of 2) (2009)
- Techne (part 2 of 2) (2009)
- Vertragsbrüchig (2012)
- Hunger (2013)
- Perfektionismus (2013)
-
Interspezifische Konkurrenz (2014)
only appeared as:
- Serializations:
- Interspezifische Konkurrenz (part 1 of 2) (2014)
- Interspezifische Konkurrenz (part 2 of 2) (2014)
- Spielfreude (2015)
- Schaitan (2016)
-
Speicherkristall (2016)
only appeared as:
- Serializations:
- Speicherkristall (part 1 of 2) (2016)
- Speicherkristall (part 2 of 2) (2016)
- Seltene Erden (2018)
- Der Testflug der Ukuqubuka (2019)
- Das Eiskastell (2019)
- Der erste Kaiser von Aximov (2019)
- Bauholz für Babé (2019)
- Im Affekt (2020)
- Die Alptraumfabrik (2005) by Robsie Richter
- Schädelfeld (2016) by Dariusz Muszer
- Zeitloser Horror (2007) by uncredited