Whisper Kiss - The Dragonfire Novels, #6

One man's mission ignites one woman's fire.Niall Talbot has volunteered to hunt down and destroy all the remaining shadow dragons - who were weakened by the destruction of the Dragon's Blood Elixir - before they can wreak more havoc. Among them is his dead twin brother, making Niall's mission not only dangerous but personal. Tattoo artist Rox believes the world is a canvas to be made more beautiful.
An unconventional spirit who isn't afraid of anything, she doesn't even flinch when a shape-shifting dragon warrior suddenly appears on her doorstep. And as a woman who follows her heart in matters of passion, she makes the perfect mate for a firestorm with Niall.