The Srimad Bhagavata Purana is called "Amal" (spotless) because it is considered the most refined of all Puranic literature, focusing purely on the glory of the Supreme Being without the typical focus on ritualistic gains.
It consists of 12 Skandhas (cantos) and approximately 18,000 verses . amal puran pdf
The life, childhood pastimes, and divine instructions of Lord Krishna (particularly in the 10th Canto) form the core of the text. The Srimad Bhagavata Purana is called "Amal" (spotless)