Harpy (Coven, Book 1)

Samantha and Kathy are witches who protect the nonmagical from evil, including Mark, a nonmagical man who was under attack by harpies. The harpies are hunting him to drag him to hell to pay for his crimes against a young woman. Knowing that, Samantha and Kathy question whether they should save Mark regardless of his past or if they should step aside and let the harpies take him. The clock is ticking and the longer it takes Samantha and Kathy to decide what to do, the more innocent people that will fall victim to the harpies' attack.