The Puranas are the eternal storehouse of knowledge

                   

These include all the cosmic and otherworldly subjects ... The branches of knowledge-science which have been invented since creation, till date, the sages have included all these subjects in the Puranas.  ..Many sources of knowledge have been revealed in the form of stories .. Vaayu Purana, Brahmanda Purana, Garuda Purana, Narada Purana, Agni Purana are mainly countable.

 Agni Purana is said to be the head of all the disciplines ..... It has also been said --- 'Agneye hi Purana Asmin Sarv Vidya: Demonstration:'...
 The entire expansion of Vedas is in the Puranas. The sources of knowledge are filled in the four codes, Brahmin texts, and Upanishads.  Knowledge is in these Puranas ... study them under the direction of a guru or saint and take advantage of the element ...