The holy books of Ayyavazhi are the Akilattirattu Ammanai and the Arul Nool, and they are the source of the religion's mythology. The holy book states that the "Akilattirattu Ammanai" was written down by Hari Gopalan Citar by hearing the contents of Akilam told by Narayana to his wife Lakshmi. There was no definite history about the beginning of Arul Nool; but the followers believe that it was written by Citars and by those who get possessed by divine power. It contains the prayers, hymns and ways for the worship in Ayyavazhi, religious practices, prophesies and also many rules. 