Tao Te Ching Brahman
Prashna Upanishad
Kena Upanishad
Dhatupatha Verbs in 5 Lakaras Vol3
Bhagavad Gita Heart and Soul
Bhagavad Gita Chanting Guidelines wrt Panini's Ashtadhyayi
Bhagavad Gita Applied Wisdom