This is a text written by Swami Vidyaranya of Sringeri mutt. Out of the 15 chapters, 10 chapters have been explained in these talks. The uniqueness of this text is that, in each chapter, one Vedantic idea is taken up and explained in detail. In these talks, all the verses of these 10 chapters have been explained elaborately.
Accompanying text for Panchadasi Chapter 4 is available for download.
The entire collection of Swamiji's talks is available at the Poornalayam website.