House of Arsceneaux - Servants of Morrigan: Immortal Creatures

Caitlin DeDanann's life is a hot mess. Recently dumped. Overworked. Burned out. Her upcoming time off is the one thing that has gotten her through all of it. Until her boss ruins it by sending her on yet another assignment. What she thinks is just a routine investigation turns out to be so much more. Vampire Evariste Gage Arsceneaux has spent over three hundred years riddled with guilt. Guilt over losing his wife.
Guilt over a curse that doomed his family. Guilt over being turned into an immortal. Evariste throws himself into the one thing that can provide a much-needed distraction from suffocating remorse: work. Reunited over an unwelcome business proposition, Evariste stares in disbelief into the unique eyes of his long-deceased wife. Knowing their time together is short, he uses their professional relationship and delicious Louisiana cuisine to keep her close to him, hoping to spark the memory of their love.
The uncovering of long-lost secrets and the resurgence of ancient evil vampires set on killing them both forces Caitlin and Evariste to work together to not only save themselves, but everything they have ever loved.