It is highly probable that Shankaraloka Deepika (Hindi) is a book or a compilation of discourses, likely by Swami Shri Ishwarananda Giriji Maharaj, dedicated to explaining the philosophy of Advaita Vedanta as taught by Adi Shankaracharya, in the Hindi language.
Such a text would contain philosophical discussions, commentary on foundational Vedantic texts (like the Upanishads, Bhagavad Gita, or Brahma Sutras), and practical guidance based on Shankaracharya's teachings on non-dualism.