Søren Kierkegaard (1813 - 1855), a Danish philosopher, theologian and writer, is rightfully considered the forerunner and at the same time the founder of European existentialism. The book includes the novel “The Diary of a Seducer.” The chronicle of the masterly seduction of a young girl with the Shakespearean name Cordelia by the cunning seducer Johannes, who lives an “aesthetic life,” is constructed as a series of “approaches”/“removals” of a reflective aesthetician from the object of his passion. The protagonist's diary and letters reveal an ideal strategy of love submission, in which Johannes' Don Juanian dexterity, Mephistophelian knowledge of human nature and Faustian penchant for introspection are manifested.