The Secret of the Nagas - Amish

As you know, this book is the sequel to 'Immortals of Meluha' (See previous post to see what happened in the first book).

In this book, Brahaspati the greatest scientist of Meluha is killed in the temple where 'Somras' the elixir of life is generated. He as well as he temple is destroyed.The Meluhans suspect it to be the Nagas. The book is all about Shiva, Sati (his wife), Parvateshwar, and his other friends and soldiers trying to track down the Nagas to destroy evil once and for all (Do you think it is possible to destroy evil completely? I certainly don't!)

On the way they meet the Brangas, who are supposedly tied up with the Nagas. True, but not entirely. The Brangas got their name as they live on the land at the intersection of river Bramhaputra and Ganga. The only reason the Brangas had tied up with the Nagas was that there was an yearly plague in their land, and the only medicine that can save them is provided by the Nagas.
Lets get an overview of the 'evils' and 'not evils':

SURYAVANSHIS - Not evil

CHANDRAVANSHIS - Not evil

BRANGAS - Not evil
 
NAGAS - READ THE BOOK!