Nightshade (Nightshade, #1)

Jillian Conrad never believed in vampires-until she was unwillingly injected with a serum that was supposed to act as a deadly poison to them. Now, tormented half-vampire Declan Reese wants her blood to destroy the undead kingdom. Unfortunately, the serum has also made her blood irresistible to all vampires-including Declan, whose desire for Jillian is more than mere hunger. Jillian Conrad always believed vampires weren’t real. But when she’s attacked by a desperate scientist, and injected with a serum meant to be a deadly poison against the undead, she realizes it’s all true. And when the scientist is shot dead in front of her, his secrets die with him. Declan Reyes hates vampires with all his heart—despite being half-vampire himself—and he knows the poison in Jillian’s veins could finally destroy the vampire king and his subjects. The serum makes her blood irresistible to all vampires—including Declan. One taste means death. Jillian Conrad is injected with a serum by a desperate scientist that is supposed to act as a deadly poison to vampires. The serum also makes her blood irresistible to all vampires, including half-vampire, Declan Reyes who is driven by duty to protect Jill and her potential to finally destroy the undead kingdom