* The Psychology of Perception (1965)
* The Concept of Mind (1967)
* The Science of Mind (1970)
* Metafysikk (1973)
* The Meaning of Life (1975)
* Verdier og det gode liv (1980)
* The Philosophical Basis of Biology (1984)
* Biologisk filosofi (1986)
* Psychology and the Philosophy of Science (1990)
* The Nature of Consciousness (1993)
* Understanding the Mind (1996)
* The Philosophy of Religion (1999)
* The Meaning of Life:A Philosophical Inquiry (2002)
* Filosofi og meningen med livet (2004)
Artikler
* "The Concept of Mind" (1967)
* "Metaphysics and the Philosophy of Science" (1969)
* "Meningen med livet" (1975)
* "Verdier og det gode liv" (1980)
* "The Philosophical Basis of Biology" (1984)
* "Filosofi og naturvitenskap" (1986)
* "Psychology and the Philosophy of Science" (1990)
* "The Nature of Consciousness" (1993)
* "Forstå sinnet" (1996)
* "The Philosophy of Religion" (1999)
* "The Meaning of Life:A Philosophical Enquiry" (2002)
* "Filosofi og meningen med livet" (2004)