* The Mindful Animal:Observations from the Heart (1998)
* The Human and the Animal:Relating across the Boundaries (2001)
* Animal Encounters (2003)
* Dogs Unleashed:The Evolutionary Origins and Domestication of the Dog (2009)
* Livshistorier til kjente dyr (2012)
* Dyrenes språk (2015)
Artikler og essays:
* "The Life of a Dog" (1995)
* "Animal Sentience and the Lessons of Science" (2000)
* "The Evolution of Animal Communication" (2002)
* "The Domestic Dog:A Model for Evolutionary Biology" (2005)
* "Dyr og den menneskelige fantasien" (2008)
* "The Science of Animal Intelligence" (2011)
* "The Future of Animal Studies" (2014)