BACKGROUND AND OBJECTIVES: Every revolution and social change affects all relations of human life. Major events such as revolution and war not only change the political and social dimensions, but also change the realm of art, and literature as one of the sub-branches of art undergoes a transformation and a new concept called sustainability literature is formed. This literature is divided into different branches, one of which is captive literature. Prisoner literature is the result of the living experience of prisoners of war in the camps, which is expressed in the form of letters or memoirs. It is necessary to address this literature in the sense that it has not yet been adequately analyzed and explained, and that the experience of prisoners of war in Iraqi camps has not been adequately reflected. Of the approximately 40, 000 Iranian prisoners in Iraqi camps, about 10 million letters have been sent to their families that need to be analyzed to examine the dimensions of the prison literature. This study seeks to answer the question: What did the prisoners think and what thoughts did they have in the difficult conditions of war? In this article, an attempt has been made to analyze and explain five hundred letters from the letters of captivity. These letters have already been selected by the Iranian Red Crescent Society and published in two volumes. METHODOLOGY: The research method is a combination of quantitative and qualitative and content analysis using works created in the field of prison literature. FINDINGS: Prisoners of war in special circumstances of their lives thought of concepts such as God, guardianship, patience and appealing to the Imams, resistance, patience and the call to patience and endurance. CONCLUSION: The letters of captivity established the culture of endurance and stability on the land of Iran and in the hearts of Iranians. In the most difficult of circumstances, they instructed families on religious and divine teachings, and they themselves learned theoretical and practical mysticism, and thus the literature governing the programs created a new kind of captive culture and literature that is unique in its kind.