The relevance of the study is due to the fact that it attempts to analyze the artistic features, genre identity and the issues addressed in one of the most significant and monumental works of Clive Staples Lewis The Chronicles of Narnia written in the late period of the writer’s work (1950–1956). In this regard, the purpose of this article is to consider the fantasy world of C. S. Lewis and the traditions of the English literary fairy tale, the genre of fantasy as a semantics-forming genre, as well as the moral issues through the prism of the Gospel values, which are fundamental in understanding the characters of the heroes. The leading approaches to the study of this problem are the comparative method, the method of philological and philosophical analysis, the dialectical and deduction method, which allow to analyze in detail The Chronicles of Narnia as a work of art in all its genre, ideological and philosophical diversity. The article presents a detailed analysis of Clive Staples Lewis’ The Chronicles of Narnia. It is revealed that this work represents a special synthesis of a number of genre structures, such as a parable, a fairy tale, and the genre of fantasy. It is substantiated in the paper that fantasy acts as the main genre structure, since it ‘generalizes’ the parable and the fairy tale, the reality and the fantasy world. The article shows that it is fantasy, as a synthesis of various genre elements, that ensures the unity of the ‘world’s dual nature’: the writer’s world, the country where he and his characters live, and the fictional country. The spiritual evolution of Lewis’ characters is accomplished through overcoming temptations, fear, indifference, and betrayal. The humaneness of Lewis’ moral position is manifested in the fact that he believes that God and his life-giving power is present in the life of every person, and the Joy of man is to meet with God. The materials of the article are of practical value for philologists, philosophers and theologists, and can also be used in lecture courses of “History of Foreign Literature of the XX Century” as well as “History of English Literature of the XX Century”, in lecture courses in cultural studies, history of philosophy of science, history of philosophy of religion, and in the teaching of theology.