 It is dedicated to the legend of Krishna, as an avatar of Vishnu.The book begins with the story of Krishna's birth, his childhood pranks and plays, his exploits, his purpose of ending the tyranny of demon-tyrant king of Mathura, named Kansa.The Krishna story in the "Vishnu Purana" is similar to his legend in the "Bhagavata Purana", in several other Puranas and the Harivamsa of the Mahabharata.