Ghostlight — B.C. Johnson

Transformed into a "phantom" by her own titanic will to live, Lucy must feed on the essence, memories, and emotions of others to keep herself solid. After defeating her Grim Reaper and learning that she could survive without hurting people, Lucy thought the madness was finally over. Her cravings for essence under control, Lucy tries to live a normal life. Apparently you have to be alive for that to work, though, as Lucy learns that one of her friends is more than she appears. She insists that Lucy, with her ghostly abilities and tentative immortality, can join her in the fight to help those in need. Thrust into the role of teenage savior, Lucy Day finds herself battling a pack of voyeuristic serial killers, a mysterious and deadly wraith, and the idea that she might actually have to start dating again sometime this century.