The Oath of the Vayuputras: The Shiva Trilogy | 
pickThis is the grand finale for the trilogy. After learning the secrets of Nagas and the dark side of Meluha, Shiva decides to visit the country of Vayuputras who presumably have nukes. This book primarily revolves around on his time in Pariha.
There's a traumatic end which I'd rather not spoil.
Go for it.
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