Kitab al-Milal wa al-Nihal

"Kitab al-Milal wa al-Nihal" is a historical Islamic text written by the 10th-century scholar al-Shahrastani. It explores various religious and philosophical groups, their beliefs, practices, and historical development. The book aims to provide an understanding of different faiths and sects within Islam and other religions, offering insights into their doctrines and origins. It is valuable for studying religious diversity and the intellectual landscape of the medieval Islamic world, serving as a comprehensive guide to the beliefs and movements that have influenced religious thought over time.