The following books are primary texts of the Hindu religion. They were written many centuries ago, and are still used in religious study today. You can search for additional texts, or different editions, in the UNC-Chapel Hill Libraries Catalog

Bhagavad Gita. Trans. Juan Mascaro. London, UK: Penguin, 2003.
The Bhagavad Gita, part of the Mahabharata, is set in a period of calm before the battle begins between the Pandavas and the Kauravas. It is a dialogue between the archer Arjuna and the god Krishna, who is disguised as Arjuna's charioteer. Krishna urges Arjuna on to battle, and dispenses advice on the three paths of liberation.
Davis Library BL1138.6 .E513 2003

Mahabharata. Trans. William Buck. Berkeley, CA: University of California Press, 1973.
This epic poem describes the long feud between two related clans, the Pandavas and the Kauravas. Interspersed there are passages on "mythology, religion, philosophy and morals."
Davis Library PS3552. U335 M3

The Ramayana. Trans. Ramesh Menon. New York, NY: North Point Press, 2003.
The other great Hindu epic is the Ramayana. It is much shorter and simpler than the Mahabharata. The Ramayana tells of a benevolent royal family in which Indian family values are espoused, and the story of Rama and Sita is told.
Davis Library BL1139.22 .E54 2003