If you found the ghosts in our first three books too charming or needy as a Halloween read, then you might be more interested in The Ghost Who Wanted Revenge.
In this book, Danielle is being haunted by a new ghost—one who believes Danielle is his killer. He has no compunction to dragging her over to his side—if he can just find some way to harness his energy.
Danielle needs to find the real killer—not just to clear her name and to stop the new haunting—but to prevent another death.