The Immortals of Meluha (Shiva Trilogy: Book 1)
Its 1900 BCE in what modern Indians mistakenly call the Indus Valley Civilization.
Books on Meluha or Mesopotamia and the ancient Indus Valley
Secret of the Nagas (Shiva Trilogy: Book 2)
His vengeance and the path to evil will lead him to the door of the Nagas, the serpent people. Of that he is certain. The evidence of the malevolent rise of evil is everywhere.