The book al-Masha'ir has been written by the prominent Iranian philosopher Mulla Sadra. It includes some discussions on existence (the quality of the inclusion and dominance of existence, grades of existence, and the principiality and realization of existence), demonstration of the Origin and His perfectional attributes, and the temporal createdness of the world. According to Seyyed Jalal al-Din Ashtiyani, this is the best book ever written on existence.

This book has been translated into Chinese, and Professor Seyyed Mohammad Khamenei has written an Introduction to it.

The Chinese translation of Mulla Sadra's Al-Masha'ir has been published in 153 pages by the Sadra Islamic Philosophy Institute.