The Upaniṣads — the philosophical core of the Vedic tradition, revealing the nature of Brahman, the Ātman, knowledge, action and liberation. The ten principal Upaniṣads together with select minor Vaiṣṇava Upaniṣads.
A small book of the Sāmaveda on a single subject: the vertical mark on the forehead, the clay of Dvārakā, and what it means to bear another's mark upon oneself. It examines the custom in detail and does not treat it as a trifle.