“The Supernatural and the fornaldarsögur: The Case of Ketils saga hængs”, in Fornaldarsagaerne. Myter og virkelighed. Studier i de oldislandske fornaldarsögur Norðurlanda, Copenhagen: Museum Tusculanum Forlag . Københavns Universitet, 2009, p. 281-98. Website

Witchcraft and Magic in the Nordic Middle Ages. Philadelphia: University of Pennsylvania Press, 2011. Website