The Epistles of Manushchihr (Minocher) (Persian: نامههای منوچهر) are a response to comments made by the author's brother on the subject of purification in Zoroastrianism.
When Zadsparam, who was the high priest of Sirjan which is located near Kerman, proposed certain new precepts, the public were not ready for change and were very unsatisfied. Therefore, they decided to complain to the high priest's older brother Manuschchihr, who was the high priest of Kerman.
In response, Manushchihr issued three epistles in the issue:
The first epistle is dated March 15, 881; the third is dated June–July 881. This book contains almost 9000 words. Manushchihar is the author of another major Pahlavi book named the 'Dadestan-i Denig'.