As it has been previously studied, Philip K. Dick's work raises existential questions that do not have a clear answer, but theyinvite us to seek the truth. One of the essential themes in his writings is that our perception about reality is false (IdiosKosmos) In this sense, Philip K. Dick's statements and novels consider that human life is a constant struggle with obstacles.This paper analyses how his biography and readings led him to form a philosophical attitude that was essential in hiswritings. Then, the motives that distort the experience and the process of searching for the true reality are compared in threenovels. On the one hand, Do Androids Dream of Electric Sheep? and Ubik show different futuristic dystopias where humanvalues are endangered. On the other hand, VALIS is about the search of transcendence from a more realistic andautobiographical approach. The aim of this article is to reflect about the search of the koinos kosmos contained in these threenovels.