The book contains the research that its author has been carrying out in recent years on the personalism of Karol Wojtyla, and which he has given us a preview of in a recent article in this same magazine. It is a work of strict philosophical anthropology, within the personalist tradition. It adds to the studies and recovery of the Polish philosopher, whose academic life was interrupted by the papacy, but whose decisive contributions should be further explored. Specifically, the aspect studied in depth in this work is that of interpersonality, so fundamental in the personalist philosophical tradition. The study systematically addresses in four chapters the self-self, the structure of the interpersonal relationship, the male-female duality and the dynamics of the "we." We will briefly review each chapter and allow ourselves to point out some objections to Wojtyla's approach (not to the author of the study, Lozano, who presents the author's thought impeccably).