- _Alexander_ (2009)
- _Dead Girls Lie_ (2010)
- _The Stones That Remain_ (2011)
- _Drengene på Baker Street_ (2012)
- _The Circle of Blood_ (2013)
- _Reglerne for overlevelse_ (2014)
- _Pigen i den blå frakke_ (2015)
- _The End of Days_ (2016)
- _The Last Girl Standing_ (2017)
- _Pigen på slottet_ (2018)
- _The Blood of Olympus_ (2019)
- _The Trials of Apollo_ (2020)
- _Tårnet af Nero_ (2021)
noveller:
- "De sidste dage i Pompeji" (2011)
- "The Ghost of Baker Street" (2012)
- "The Mystery of the Blue Room" (2013)
- "Faraoernes forbandelse" (2014)
- "The Secret of the Lost City" (2015)
- "The Adventure of the Orient Express" (2016)
- "Sagen om det forsvundne manuskript" (2017)
- "The Mystery of the Haunted House" (2018)
- "Århundredets forbrydelse" (2019)
- "The Puzzle of the Missing Piece" (2020)
Andre skrifter:
- _The Making of Alexander_ (2009)
- _The Making of Dead Girls Lie_ (2010)
- _The Making of The Stones That Remain_ (2011)
- _The Making of The Boys on Baker Street_ (2012)
- _The Making of The Circle of Blood_ (2013)
- _The Making of The Rules of Survival_ (2014)
- _The Making of the Girl in the Blue Coat_ (2015)
- _The Making of The End of Days_ (2016)
- _The Making of The Last Girl Standing_ (2017)
- _The Making of the Girl in the Castle_ (2018)
- _The Making of The Blood of Olympus_ (2019)
- _The Making of The Trials of Apollo_ (2020)
- _The Making of The Tower of Nero_ (2021)