Mazandarani language

Mazandarani (in Mazandarani: ) is a Iranian language. It is spoken in northern Iran. Areas that use it are: Mazandaran, west of Golestan, north of Tehran and Semnan and northeast of Qazvin. Between 3-4 million people speak it. Mazandarni is an older Iranian language. 
Script and alphabet.
Mazandarani language was written in the Pahlavi alphabet in the early centuries of Islam. The language uses the Arabic alphabet.
Literature.
Mazandarni language has the oldest literature among local languages in Iran. Among books written in this language are: