This book has two parts. In the first part, Das elucidates the main arguments offered by Suresvara in his Naiskarmasiddhi. Suresvara, being a direct disciple of Saṅkara, is one of the most authentic representatives of Advaitism. This leads Das to explain the main arguments of Suresvara, which actually would present the main contentions of the Advaita position. In the second part, Das offers his understanding of avidyā, one of the central themes of Advaita philosophy.