Life Blood (Cora's Choice #1)
by V. M. Black
She wanted life. He needed her blood. Cora Shaw will do anything to live. Diagnosed with terminal cancer, she is given a choice: Call hospice, or seek out a mysterious man who promises an impossible—and insanely dangerous—cure.
She knows him only as Mr. Thorne, a reclusive billionaire with strange, impossible powers over her. A man, she discovers, who is not a man at all.