Atmatattva is a major treatise on unitarianism as propounded by Saccidanandapurush Sri Sri Babathakur. The speciality of the book is that it contains novel and spontaneous unfoldment of the essence of Supreme Being and Truth Absolute as revealed to the Divine Master. Over 15 chapters this unfoldment has been very gradual and scientific.

Tattva essentially is Atma and Atma essentially is tattva. This tattva is the realization of realizations, Knowledge of Knowledge. This is what the Master calls Swabodh Atma. This Swabodh and I-ness are not different. The mundane life is a life of nescience and ignorance, of non-self knowledge. Atmatattva is the key to establish self knowledge in a man by eradicating his ignorance and non-selfness.