Royal Covens3 books in series
Blood Demand Publisher's Summary
Every 125 years, the four sinfully sexy ruling coven lords choose a new concubine from the human population.
They handpick a woman based on blood type, often looking for one with the rarest blood type in the world: AB-negative. Only .06 percent of the population carries it. To vampires, it's the holy grail, the city of gold. To human women, it's a secret to be coveted, for the lords are known for their cruelty above all else.
Too bad I was born with it. My blood is both gold and poison.
It was easy to stay hidden until my 2th birthday, but from that year forward, every human on the planet is required to donate blood once per month. For me, that dreadful date is in two days. From that moment on, I will be a helpless fool in their cruel game of cat-and-mouse.
As soon as the coven leaders have me locked between their bloodied hands, I know they'll never let me go.
Note: This is a medium-heat reverse-harem romance suited for new adult audiences.