The book "Theory of Literature. Gymnasium Course. Year Two: Theory of Prose" was published in St. Petersburg in 1851 by the printing house of the Imperial Academy of Sciences. It is the second part of the gymnasium course on the theory of literature and is devoted to the theory of prose. The authorship is attributed to Konstantin Petrovich Zelenetsky (1812-1858), a professor at the Richelieu Lyceum and a member of several scientific societies. Contents of the book: Prose theory: a section devoted to the study of prose, its features, structure and style. This publication is rare and of interest to collectors and researchers of the history of Russian literature and pedagogy of the XIX century. It reflects the methodology of teaching literature in gymnasiums of that time and can serve as a valuable source for studying educational standards and literary approaches of that era. Historical and scientific value This book is part of the educational program of the XIX century and reflects the methodology of teaching Russian literature in gymnasiums of that time. It was published under the supervision of the Department of Public Education, which emphasizes its official significance. There are stamps of libraries