L.J. Smith - Night World

Night World: Bind-up v. 3, Bks. 7-9 (Night World #7-9) 

by L.J. Smith

The Night World is a secret society of vampires, werewolves, witches and creatures of darkness - a place too dangerous to fall in love. In Huntress, Jez Redfern is leader of the Night World vampires, but had an instinct to protect innocent mortals from her former friends ... Can She resist her desire for blood?
In Black Dawn, Maggie's brother, Miles, goes missing. Her search for him leads Maggie to the vampire, Delos, to whom she is strangely attracted. But while Delos lives, Miles could be lost forever.
In Witchlight, Keller is a shapeshifter. She is searching for a new Wild Power and battling her attraction to the dashing Galen. But it seems he can never be her soulmate ...