Out of the eleven principal Upanishads that Sri Shankaracharya commented upon, this volume contains the translations of the following four Upanishads: Aitareya, Mundaka, Mandukya (along with Gaudapada's Karika), and Prashna, along with their commentaries by Sri Shankara. The study of these commentaries by such an ingenious philosopher-saint like Shankara is indispensable for the proper evaluation of the Vedanta philosophy. Like volume 1, it contains the text of the Upanishads in Devanagari, a lucid and faithful translation of the text and commentary, relevant notes, references to quotations, and an index to texts.