The Comprehensive History of Iran (Persian: تاریخ جامع ایران‎) is a twenty-volume book series about various aspects of Iran's political, social and cultural history from pre-Islamic times to the extinction of the Qajar dynasty. The research, compilation and writing of this multi-volume book has lasted for 14 years. The first five volumes of this series narrate the period of ancient Iran and the other 15 volumes narrate the history of Iran in the Islamic period, political, social, cultural, scientific, literary and artistic history. One hundred and seventy foreign and domestic authors have been used to write this multi-volume book.