The summoned - Cameron Dokey

Everyday life has its pitfalls when you're a half-demon plagued by visions. Doyle is in the supermarket when the latest vision hits him, but as usual it reveals only a handful of clues. Fear. Fire. Death... and an ornately engraved amulet.
When Doyle regains his senses he finds he is being tended by Terri Miller, a shy girl from a small town who is newly arrived in LA and feeling overwhelmed by the big city. But no sooner has Doyle thanked and left her than she is befriended by a stranger, a charismatic young man who invites her to meet his companions at a club to which they belong.
Meanwhile Angel Investigations are on the trail of a savage killer. Before long they discover the victims share something in common: several have connections to Terri's newfound friends. Then Cordelia finds herself in possession of a mysterious amulet that somehow looks awfully familiar...