Historically, the Caucasus region during the Sasanian period was among the important parts of Iran. Many studies have been conducted by archeologists, historians, and linguists on this region. The book entitled Middle Persian Inscriptions of the Era of Khosrow Anushirvan in Darband, Caucasus (Dagestan) by Cyrus Nasrollahzadeh is one of the attempts to investigate this region through available inscriptions.