A book titled "Persian-language Sources of Azerbaijan History" co-authored by Dr. Nurlan Nasirov, faculty member of the Department of History and Archaeology at Khazar University, has been published. The book examines the biographies of historians who lived in the 13th-15th centuries (during the Mongol, Timurid, Qara Qoyunlu and Aq Qoyunlu periods), and also translates information related to Azerbaijan history from their works. The monograph incorporates 21 Persian primary sources into the research, some of which have been translated into Azerbaijani for the first time.