Shatprashnopanishat Bhashya of Acharya Madhwa is publised in Kannada and Sanskrit PDF format.
Shatprashnopanisat is the eighth Upanisad belonging to the Atharvaveda. Acharya Madhwa has written this as a string of evidential quotations from other works, excepting just a few sentences of his own.
He concludes his commentary with firm conclusion that even in the state of Mukthi or salvation the Jiva or Atman retains his Identity and remains under the shelter of the supreme being.
Be blessed to read this, by clicking the below link
SRIMADHVYASA 