McGuire, Seanan. Ghost roads #3

DAW book collectors #1884

"Rose Marshall died when she was sixteen years old and on her way to her high school prom. She hasn't been resting easy since then; Bobby Cross, the man who killed her, got away clean after running her off the road...She's been looking for a way to stop him...But things have changed in the twilight world where the spirits of the restless dead continue their lives. The crossroads have been destroyed, and Bobby's protections are gone. For the first time, it might be possible for Rose to defeat him"--