Singer Sonu Nigam has launched "Vayuputras", a music album for the forthcoming book "Oath of the Vayuputras", a part of the Shiva trilogy by author Amish Tripathi.

Nigam is glad to be a part of the first-ever musical soundtrack of a book series.

"I have recorded a lot of albums and have sung for many films, but this is the first time I have sung for a book!," the 39-year-old said here Monday at the launch.

"I am glad to be a part of this trilogy. The music for the book has a lot of fusion and has been composed by some really talented people," he added.

"Oath of the Vayuputras" is the third and the final instalment of the Shiva trilogy by Tripathi and is set to come out in March this year.

The cover page of the book was launched last year by filmmaker Karan Johar.

"The Immortals of Meluha" and "The Secret of the Nagas" were the first and the second books, respectively.