The Vampire Pirate Saga

Sea Slayer Kelia Starling has grown up with one truth: Sea Shadows are vicious creatures that need to be eradicated. No exceptions. Not even for him. The Society's sole purpose is to protect the general population from supernatural monsters, and Kelia's their top Slayer. But when her father is murdered and her handler insists it's suicide, she starts to question whether the Society really has her best interests at heart.  

Following the discovery of her relationship with the infamous Sea Shadow Drew Knight, Sea Slayer Kelia Starling is condemned to a life of servitude. Kelia is still investigating why the Society murdered her father, while Drew has secretly visited her to call on the favor Kelia owes him. But as Kelia's research intensifies and her missions intersect, Kelia is confronted with a disturbing realization: Before her father's death, he'd created a wicked breeding program that forces relations between Shadows and irredeemable Sightless. And Kelia's just been placed in the program.