Aparokshanubhuti
The Aparokshanubhuti is a famous work attributed to Adi Shankara. It is a popular introductory work that expounds Advaita Vedanta philosophy. It describes a method that seekers can follow to directly experience the essential truth of one's one nature. Thus, the work is literally titled Aparokshanubhuti, or Direct Experience. Swami Vimuktananda titles his translation Self-Realization.Commentaries
The oldest extant commentary on this work is a Sanskrit commentary by Sri Vidyaranya. This work has been repeatedly translated and commented upon in other languages.