This is a unique and distinct work. It studies the Vedanta schools of Sankaracarya, Bhaskara, Ramanujacarya, Nimbarkacarya, Madhvacarya, Vallabhacarya and other neglected schools of Srikantha, Sripati Pandit, Vijnana-bhiksu and Baladeva Vidyabhusana. It gives an emphasis on the great Acaryas' Brahmasutra commentaries with reference to the philosophically important topics, which are discussed in the first four sutras (Catuchutri) in particular and other specific sutras in general. A study of the Vedanta schools with reference to the Brahmasutra commentaries exposes the distinct characteristics of the Vedanta schools by classifying them with a new parameter of Tantrism. A nobel classification of Vedanta schools in terms of Srauta (Aupanisadic schools) and Puranic schools gives us a clue to understand truly the texture and nature of the Brahmasutra. A study of the Vedanta schools in the light of Brahmasutra commentaries gives a new direction to the study of the Brahmasutras.