Is God Real? The Riddle of Credulity - An Enquiry into the Nature of Reason, Mysticism and Religious Belief, as Aspects of Human Species Solipsism Walker Alan Henry Heftet / 1999 / Engelsk
Theory of Consciousness An Enquiry into the Nature and Incidence of Primary Awareness in Sentient Creatures Walker Alan Henry Heftet / 2004 / Engelsk
What Do You Know? A Common-Sense Guide to Philosophy and Religion Walker Alan Henry Spiral / 2005 / Engelsk
Liberty and Law An Enquiry into the Nature and Relative Functions of Secular and Moral Law in Liberal Societies Walker Alan Henry Heftet / 2002 / Engelsk
Are Bricks Real? - The Riddle of Perception Enquiry into the Nature of Perception and Knowledge as Aspects of Human Species Solipsism Walker Alan Henry Heftet / 1995 / Engelsk
