Shadow Wolf by Jane Godman

They are the Arctic Brotherhood.

They are deadly fighters, fierce protectors and loyal mates.

Samson Lee last saw Valetta Rickard five years ago when a shared a kiss almost led him to break the promise he had made to himself. Now Valetta has disappeared, and Samson has promised her father he will find her. When Samson finds Valetta leading a rogue gang of bloodthirsty Arctic werewolves, he soon discovers that all is not what it seems. As soon as they see each other again the feelings they denied all those years ago resurface.

Valetta is Shadow Born, a rare and mystical werewolf with legendary powers. If she chooses, she can destroy a whole species. A power that an evil hunter wants so that he can destroy the Arctic wolves. Samson, together with the other members of the brotherhood, must find the hunter before he can put his plans for Valetta into action. At the same time, Samson must put the past behind him and convince Valetta that she is worthy of love.