The classic of Tatar literature Gayaz Iskhaki was born in Kutlushkino (Yaushirma) village of Chistopolsky district in the family of a famous mullah who engaged in education and charity. First, he received knowledge, love for books and reading from parents and maternal grandmother and later in the day school of the village. He continued his studies in a famous in the Muslim world of Russia and the countries of the East madrasah of Zakir Kamalov, which not only produced future imams, hazrats, but also teachers for other madrasahs. This period of his life spent in Chistopolsky district laid the foundation for the worldview of the future writer and thinker and played an important role in shaping the personality of G. Ishaki. It was there, in the Chistopolsky prison, that the autobiographical novel "Zindan" was written, which testifies to his passion for revolutionary ideas and reflects the real facts from the life of the Chistopolsky prison. The autobiographical work "Zindan" is based on real events and provided with various historical and cultural facts and details from the literary life of the epoch. The text reflects the perception of current events by the writer who was the witness and an active participant in them. The novel "Zindan" was published in a separate edition in Kazan in 1907. Due to the humanity of the censor N.F. Katanov, the book was not confiscated and criminal prosecution against the author was not initiated. The interest of the Central Committee of Foreign Censorship of St. Petersburg manifested in 1908 in relation to the work of G. Iskhaki led to a thorough examination of the content of "Zindan" by another member of the Kazan Provisional Committee for Press Affairs N.I. Ashmarin in order to search for places with signs of "crimes". His review led to the decision of the Committee to seize Iskhaki's pamphlet "Zindan" because of the illegal content, bringing the author to criminal responsibility under the article 129 of the Criminal Code. The author of the article summarized the material on the period from the biography of G. Iskhaki spent in Chistopolsky district and revealed the great work of the scientific community of Tatarstan to return its literary heritage to the history of Tatar literature of the twentieth century. The interpretation of the story "Zindan" by various literary critics in the historical, cultural and literary context of the epoch showed that the story "Zindan" in the form of a prison chronicle introduced new ideological and thematic tones into Tatar literature and gave impetus to the rapid development of the autobiographical genre in Tatar literature being of high value as a historical source.