Beneath Fated Bonds by Anna Hawke

Cold. Remote. Vengeful.

When she looked at him, Nova saw a man devoid of empathy. Kane, a known antagonist during the war, had instigated the bitter, centuries long conflict between their nations. As a rare female alpha, her blood ran cold with aggression, but the wolf beneath her skin was far more enticed by him than enraged.
Once her mortal enemy, the leader of the vampire council had approached the werewolves with offers of peace. On the very night their truce would’ve been secured, an attack on the vampire nation throws their treaty into question.
When Nova and Kane are forced to work together to eliminate a threat to the immortal societies, passion ignites in the most unlikely of places. As desire builds and the stakes rise, their fates intertwine, and they must overcome their animosity—and their trauma—to defeat the threat against their nations.