Guardian, The (Forbidden Doors #5) by Bill Myers - Vintage Paperback

Rebecca is stunned when her best friend, Julie, is almost killed by a hit-and-run driver. But the accident is only the beginning of Julie’s trouble. Someone—or something—has come to watch over her, to guide her, to “lead her to enlightenment.” Suddenly Becka, Scott, Ryan, and their friends are caught up in a battle against the most devious deception they’ve ever faced.

A deception that may well overtake them all…