The Vishnu Purana (Viṣṇu Purāṇa) is a religious Hindu text and one of the eighteen Mahapuranas. It is considered one of the most important Puranas and has been given the name Puranaratna (gem of Puranas). Vishnu Purana includes many stories well known in Vedic tradition, including the various avatars of God Vishnu and the life of his complete incarnation, Krishna. Presented as a dialogue between Parashara and his disciple Maitreya and divided into six parts, the major topics discussed include creation, stories of battles fought between asuras and devas, the Avatars (divine descents) of Vishnu and genealogy and stories of legendary kings. Vishnu Purana ascribes its authorship to Veda Vyasa. The Padma Purana categorizes Vishnu Purana as a Sattva Purana (Purana which represents goodness and purity).