Guardians of the Assassins by Stacey Brutger

WAR THREATENS THE PARANORMAL COMMUNITY. IF THE ASSASSINS CAN’T PREVENT THE LOOMING BATTLE, SUPERNATURALS WILL CEASE TO EXIST.

Morgan and her mates don’t even have time to settle into their new home before the local wolf pack demands she turn herself over to the alphas. If she refuses, they vow to destroy everything she holds dear.
Not one to back down from a fight, she confronts them and barely manages to escape with her life. Peace in the realm is fragile, and the incident draws the wrong attention. When she and her mates come under attack, secrets in the pack surface, threatening to destroy them from within.
Refusing to give up her home without a fight, Morgan must face a trial with the odds stacked against her. Failure is not an option. As an assassin, it’s her place to decide who lives and dies. If she makes one wrong choice, not only will she lose her new pack and her mates, it could annihilate the entire supernatural community.