- "The Book of God:A Novel of the First Manuscript of the Bible" (2011)
- "The Second Manuscript:A Novel of the Hidden Secrets of the Vatican" (2012)
- "Det tredje manuskriptet" (2014)
- "Det fjerde manuskriptet" (2015)
- "The Fifth Manuscript:The Seal" (2016)
- "Det sjette manuskriptet:The Secret of the Magi" (2017)
- "The Seventh Manuscript:The Last Prophecy" (2018)
- "Det åttende manuskriptet" (2019)
- "Det niende manuskriptet" (2020)
- "Det tiende manuskriptet" (2021)
- "Det ellevte manuskriptet" (2022)
Noveller:
- "Der letzte Mönch" (Den siste munken) (2008)
- "Die geheime Bibliothek" (Det hemmelige biblioteket) (2008)
- "Das verbotene Buch" (Den forbudte bok) (2009)
Faktalitteratur:
- "Die Suche nach dem verlorenen Wissen" (The Search for Lost Knowledge) (2010)
- "Die geheimen Archive der Vatikan" (The Secret Archives of the Vatican) (2012)
- "Die verschollenen Manuskripte" (De tapte manuskriptene) (2014)
- "Die verbotenen Bücher der Bibel" (The Forbidden Books of the Bible) (2015)
- "Die wahre Geschichte der Illuminaten" (The True History of the Illuminati) (2016)
- "Das Vermächtnis der Tempelritter" (Arven etter tempelherrene) (2017)
- "Die Geschichte der geheimen Gesellschaften" (The History of Secret Societies) (2018)
- "Die Geheimnisse der Freimaurer" (Frimurernes hemmeligheter) (2019)
- "Die geheime Welt der Rosenkreuzer" (Rosicruciernes hemmelige verden) (2020)
- "Die Suche nach dem Heiligen Gral" (The Search for the Holy Grail) (2021)