If you're a fan of Sherrilyn Kenyon, you'll already be familiar with her latest novel, Infinity: Chronicles of Nick. (Which, incidentally, has made it to my summer reading pile.) As part of her marketing campaign, the background music to the book's two trailers is available for download as a free WAV file.
The song, Kill Like This, is by Adam Ezra Group.
Adam Ezra Group - Half a Hero & Kill Like This