Elfmoon - The Elfmoon Trilogy, #1

Elfmoon is an erotic novella with explicit imagery - if you are offended by erotic content, please be forewarned before reading. Months later and Taryn is starting to feel normal again. Tonight is the Summer Solstice Celebration and Taryn sets out to enjoy the revelry with her best friend, and fellow Bright Elf, Roxy. It is also the full moon and while Taryn is off with her lover, Daniel, raising her magic with their lovemaking, something horrible is happening at the festival.
Humans are becoming struck with Moon Madness, turning into crazed, blood hungry beasts, killing anyone they can reach. But what is worse for Taryn is that she cannot find Roxy. In this action pact, lust filled sequel to the Elfbitten trilogy, Taryn must find her friend and stay alive. But whenever she uses her powers, she drains them little by little, luckily she has Daniel to help replenish her depleted powers.