Havoc - Ghost Stories Trilogy, #2

Waking up to ghosts isn't unusual for Adele Gray. She's a psychic medium and it's something she grew up with. However, the ghosts appearing lately are different. They're victims of mass murders which have been occurring all over the country. Adele and the spirit of her deceased identical twin sister, Amelia, are unable to help them crossover to the other side. Sensing a negative energy attached to these spirits and desperate to rid herself of the growing number of paranormal house guests following her everywhere, Adele reaches out to someone from her past.
Five years have passed since Demonologist Finn Rafferty last spoke to the psychic medium who captured his attention and who he never forgot. He jumps at the opportunity to work with Adele, but the more he learns about the peculiarities surrounding the ghosts and the sinister element attached to them, he realizes the case may be connected to the death of his father and could provide answers he's been seeking since his childhood.
Adele and Finn determine that an evil spirit is using people through possession - turning them into puppets being forced to carry out heinous crimes. Knowing a killer ghost is something that can't be stopped through normal legal channels; they race across the country, using information provided by Amelia from the other side, hoping to catch the evil spirit before it kills again.