* The Case of the Orphaned Bassoon (2003)
* The Case of the Gypsy's Fiolin (2005)
* The Case of the Vanished Village (2008)
* The Case of the Spanish Galleon (2011)
* The Case of the Hidden City (2014)
* The Case of the Egyptian Jewel (2016)
* The Case of the Jade Mask (2018)
* The Case of the Stolen Sapphire (2019)
* Saken om det mystiske manuskriptet (2021)
* The Case of the Midnight Rider (2022)
Noveller
* "Saken om den savnede Stradivarius" (2003)
* "The Case of the Purloined Piano" (2004)
* "The Case of the Stolen Symphony" (2006)
* "The Case of the Disappearing Diva" (2007)
* "The Case of the Phantom Piper" (2009)
* "The Case of the Buried Treasure" (2010)
* "The Case of the Ancient Idol" (2012)
* "The Case of the Cursed Painting" (2013)
* "The Case of the Haunted House" (2015)
* "The Case of the Time-Traveling Telescope" (2017)