The book was released on 27 February 2013, through Westland Press and completes the mythical story about an imaginary land Meluha and how its inhabitants were saved by a barbarian named Shiva.

Following the release of the cover art, it was announced that the publication rights of the books have been bought by both US and UK publisher houses.

After its release, The Oath of the Vayuputras received positive reviews for the story and characterisation with Business Standard calling Tripathi 'India's Tolkien'.

On meeting Brahaspati at the Naga capital of Panchavati, Shiva learns of the evil "Somras", and its ill effects on the people of India.

The waste generated in the process of manufacturing the Somras was dumped in the Tsangpo river, which flows through Branga territory as Brahmaputra, and resulted in their disastrous plague.

Also the birth of Naga babies was credited to Somras as it results in the multiplication of cells at a very high rate which lead to their deformation and outgrowths.

Seeing that Meluha is the center of manufacturing the Somras, Shiva declares a holy war on the Kingdom and appeals the people to stop using the drink.

Following this defeat, Shiva abandons the plan of invading Meluha and leaves for Pariha with Gopal; they wanted to procure the deadly Brahmastra weapon, to threaten the Meluhans for peace with them.

Mithra convinces the Vayuputras that Shiva is the real Neelkanth and gives him the Pashupathiastra which acts on a specific target, rather than annihilating everything like the Brahmastra.

Parvateshwar, Anandmayi, Veerini decide to stay back in the city and die with it, but Kartik persuades Bhrigu to remain alive and share his vast knowledge with future generations.

These books have continued to top the bestseller lists of Nielsen BookScan, with the gross retail sales being impressive at ₹22 crore (US$2.5 million) within two years of publishing.

He explained that since Shiva is a mortal in his series, he would have a fitting epilogue in the book, with many of the loose ends of the plot finally being deciphered.

[19] Since some of the characters have their mythological names, but do not follow the characteristic traits, Tripathi believed that such development was spontaneous and did not question his writing further.

Giving an example, the author said: "When I was writing the first book, I was struggling with the Naga, because I wanted to desperately change his character – that he should be jovial and happy.

[9] The author added that Pusalkar had managed to merge in many of the symbolic elements represented in the storyline of the book, while maintaining the same visual appeal of the previous releases of the trilogy.

[20] The UK publication rights of the Shiva trilogy, including The Oath of the Vayuputras was purchased by Jo Fletcher Books, with the deal being made by Claire Roberts at Trident Media Group, acting on behalf of the author and the author's Indian agent, Anuj Bahri of Red Ink Literary Agency.

[24] The album had nine songs dedicated to Lord Shiva with several Bollywood singers lending their voices, and was inspired by the different sections and storyline in the books.

[28] In an interview with Business Standard, Surve explained: "After tasting the stupendous marketing success of, The Secrets of the Nagas, we are very excited to partner with Amish for the launch of The Oath of the Vayuputras.

He complimented the fact that philosophical discussions in the book is rightly balanced by action sequences, commending the way in which Sati's fight with the assassins is described.

[29] Phorum Dalal from Mid-Day praised the urban dialect used by Shiva in the book and felt that Tripathi's grip on the whole story is steady and has the reader's undivided attention, ultimately "giving the Trilogy an end it deserves".

[30] Sanjeev Sanyal from Business Standard gave a neutral review saying that although the fast-paced and easy style from the earlier books has been retained, it is evident if one goes back and rereads the first few pages of The Immortals of Meluha that Tripathi has become much more comfortable and confident of his writing.

For the rest of us, it is delightful to see how Tripathi applies simple language to evoke great battle scenes and extraordinary landscapes".

"[32] The Kolkata Statesman's Mrityunjay Khurana gave a positive review to the book, saying "Amish has skillfully used Upanishadic, Puranic, Zoroastrian and Buddhist mythological images and their essence in lucid and contemporary language."

The review goes on to say that Tripathi had tried to bring out knowledge from the dogma-box approach and that despite the author's much criticized "clunky language and sloppy grammar", the tale reached its goal of attraction the attention towards Mythology and traditions, along with inspiring readers.

[35] Anuj Bahri, who was the first publisher for The Immortals of Meluha, said that the deal could go up to US$4 million once they acquire the film, foreign and translation rights for the books.