Tooth and Claw

Vampires.
The Man in the Moon's bloodthirsty children forged from his scorn.
Shifters.
Mother Nature's fearless, noble servants, who risk death by bite in their constant struggle to keep the vampires at bay.
Macy's entire life has been devoted to Mother Nature and upholding her glory, despite Macy's incompetence as a shifter. When she's bitten by a vampire but doesn't die from the venom, everything changes. Overnight, she becomes one of the monsters she reviled. Severed from her girlfriend, her people, her home, and her faith, everything is called into question.
And then the Man in the Moon whispers about something even more terrible lurking on the horizon.