"Oath of the Vayuputras" is the third book in the Shiva Trilogy written by Amish Tripathi. It continues the story of Shiva, a legendary figure in Indian mythology, as he battles against the forces of evil and seeks to unite the land of Meluha and its neighboring kingdoms. The narrative explores themes of duty, sacrifice, and the quest for truth. In this installment, Shiva learns about the ancient order of the Vayuputras, who possess deep knowledge and wisdom. The book delves into the complexities of alliances and the moral dilemmas faced by its characters, ultimately leading to a climactic confrontation that shapes the future of their world.