The Hemlock Exchange

Her blood. Sabine's cells. A controlled exchange-and nothing more. Three weeks after losing her medical research license, Ines Alvarado moves into a decaying apartment building with one suitcase, a box of forbidden notebooks, and no intention of living an ordinary life. When a cut on her hand exposes her enigmatic landlord's barely restrained hunger, Ines confirms what she has already begun to suspect.
Sabine Delacroix-Row is a vampire. For more than two centuries, Sabine has survived by making restraint her religion. She never feeds from the same person twice. She never permits attachment. Most importantly, she never allows a human close enough to become an exception. Ines offers her a bargain anyway: scheduled access to her blood in exchange for samples of Sabine's regenerative cells. The arrangement will be clinical, consensual, and governed by strict rules.
Ines gets the research that could resurrect her ruined career. Sabine feeds without hunting. Either woman can end the agreement whenever she chooses. But the second exchange is not about the data. As rain closes around the building and their carefully negotiated boundaries begin to dissolve, feeding becomes anticipation, research becomes intimacy, and restraint becomes another word for denial. Ines is no frightened victim, and Sabine is not the only dangerous woman in the room.
Each session draws them deeper into a mutual dependence that threatens Ines's body, Sabine's hard-won control, and the secrets both women have mistaken for protection. Sabine has spent centuries believing that loving a human can end only in ruin. Ines has spent years pursuing a discovery intense enough to consume her. When the bargain becomes impossible to separate from desire, will they save themselves from the hunger-or finally admit that neither of them wants to be saved?