Kiss at Midnight (The Shades of Northwood 4‪)‬

Being a ghost isn't as much fun as it sounds. Given that Katie had to die to become one, it wasn't exacxtly on her list of ambitions to begin with.
As if learning how to cope with being dead wasn't enough, one of her dead brothers is stalking her, intent on taking her into the Dead World. Her boyfriend is trapped there but he's been dead for centuries and even he's scared of something there...