Shadow’s End by Keri Arthur

Two ancient vampires and a centuries-long war. Their final battlefield? The Faelan Werewolf reservation…

With a wedding to plan and a future mother-in-law who hates her, the last thing Lizzie Grace needs is two psycho vampires rampaging through Castle Rock.
But as their battle draws ever closer to her circle of friends, Lizzie finds herself unwillingly drawn deeper and deeper into their conflict.
Then one vampire does the unthinkable, and Lizzie goes to war.
Can she save everyone she loves and finally get her happy ending with Aiden?
Or will darkness forever claim the reservation and consume them all?