Ghost stories (Seanan McGuire)

"For Rose Marshall, death has long since become the only life she really knows. She's been sweet sixteen for more than sixty years, hitchhiking her way along the highways and byways of America, sometimes seen as an avenging angel, sometimes seen as a killer in her own right, but always Rose, the Phantom Prom Date, the Girl in the Green Silk Gown. The man who killed her is still out there, thanks to a crossroads bargain that won't let him die, and...