Branded by Fire by Nalini Singh

Though DarkRiver sentinel Mercy is feeling the pressure to mate, she savagely resists when Riley Kincaid, a lieutenant from the SnowDancer pack, tries to possess her. The problem is not simply that he pushes her buttons; the problem is that he’s a wolf, she’s a cat, and they’re both used to being on top. But when a brilliant changeling researcher is kidnapped from DarkRiver territory, Mercy and Riley must work together to track the young man—before… Read more.