This thesis offers a model for the underlying architecture of the narrative reality in science-fiction works by Philip K. Dick, arguing that Dick's fictional worlds are grounded in the pervasive metamorphosis - the overarching perception of the shifting - of the narrative fabric operating under the conditions of non-rationality and non-reality. The hyphenated coinages conveniently stand for the paradigms of the reality and mental configurations in PKD subverting the seemingly natural dichotomizing oppositions and hierarchies of the real/unreal and the rational/irrational. Bringing in Gilles Deleuze's ontology of difference, this thesis explains the non-rationality and non-reality of Dick's worlds in Deleuzian terms as, firstly, inducing the perception of fictional reality as realizing the innate potential of being by the perpetual becoming of being in multiplicity and, secondly, engendering - in the vein of Deleuzian simulacra - the impossibility of apprehending and categorizing fictional reality unequivocally. The thesis considers and evaluates the underlying assumptions and claims common to various approaches to the subject of reality in PKD's fictions in order to provide the essential context for the following development of the theoretical basis for non-rationality and non-reality shifting....