- _Praktisk ubrukelige overlevelsestips_ (2011)
- _The Book of Lies_ (2013)
- _The Book of Bad Advice_ (2014)
- _The Book of Horrible Histories_ (2015)
- _The Book of Hilarious Hijinks_ (2016)
- _The Book of Stupid Inventions_ (2017)
- _The Book of Epic Fails_ (2018)
- _The Book of Weird World Records_ (2019)
- _The Book of Crazy Laws_ (2020)
- _The Book of Useless Information_ (2021)
Romaner
- _The Dead Kid Club_ (2014)
- _The Ghost in the Attic_ (2015)
- _Skyggen i kjelleren_ (2016)
- _Skapningen i skapet_ (2017)
- _Hemmeligheten i veggene_ (2018)
- _Monsteret i speilet_ (2019)
- _Vampyren i kirkegården_ (2020)
Noveller
- "Kjelleren" (2012)
- "The Attic" (2013)
- "The Closet" (2014)
- "The Walls" (2015)
- "The Mirror" (2016)
- "The Graveyard" (2017)
Artikler
- "How to Survive a Zombie Apocalypse" (2012)
- "De 10 mest ubrukelige overlevelsestipsene" (2013)
- "De 5 mest morsomme hijinks" (2014)
- "De 7 mest fryktelige historiene" (2015)
- "De 11 mest dumme oppfinnelsene" (2016)
- "De 13 mest episke mislykkes" (2017)
- "De 17 mest rare verdensrekordene" (2018)
- "De 19 mest gale lovene" (2019)
- "De 23 mest ubrukelige informasjonene" (2020)