He founded the private cinema Tønsberg Kino, and has taken an active part in contemporary debates, including writing non-fiction books.
[3] His next book was Det annet kinn from 1999, and his crime novels in the early 2000s include En rettferdig dom (2000), En nødvendig død (2002), Den siste dansen (2004), Din eneste venn (2005), For Guds skyld (2007), Det ingen vet (2008), Madrugada (2009), and Bake kake søte (2010).
[4] Mehlum's books from the 2010s include the crime novels Straffen (2011) and En god sak (2012), the thriller Lengsel etter penger from 2013, and the crime novels Ren samvittighet (2014), Et hardt slag (2015), To komma åtte sekunder (2016), and Hvit engel, svart natt (2018).
In Fornemmelse av skyld from 2019, Foyn consults Varg Veum, when part of the novel is set in Bergen.
[1] In the novel Etterpå er vi alle kloke from 2023 Foyn investigates a case where the statute of limitations has passed.