The composition of the novel by E. Sosnovsky “Aglaia’s Apocripha” is analyzed in the article. The composition is the organization of discourses of characters, i. e. the subject structure. The novel consists of four parts, united in pairs; the composition is based on the model of “novel in the novel”. The peculiarity of this model in the “Aglaia’s Apocripha” is the inversion: from the text, which is usually called inset, the work begins, and the compositional role of the inserted text is played by the encompassing work. Two composition sections of the “Aglaia’s Apocripha” are opposed to each other; first of all, by the value of various discourses of the central characters - Adam (in the first section) and Krzyszt of (in the second). All the events depicted in the novel are given in a “multi-centered perspective” (P. Florensky). These main features of the composition are designed to create a special reading position - similar to the one in which the heroes are, not always able to distinguish illusory and true reality.