Sell Peter J Sell 
Death Scanner [EPUB ebook] 

In this novel ghosts are the result of the emotions of the traumatic occasion being absorbed by inanimate objects (room, murder weapon etc). Sensitive people see a re-enactment of the murder recreated in their minds and it appears to them as ghosts. An Oxford University Professor researches this phenomenon and invents a machine that can read these emotions imprinted on inanimate object after a murder that had happened in the objects vicinity. He recruits three post graduate students to help him develop the machine to be used in crime fighting and archaeology. They inadvertently discover a secret that some in the Catholic Church would rather not be revealed. This is the story of a race against the forces of an evil department within the Vatican, a serial killer who is someone too close for comfort and two of the students. They have to find the so called treasure that the Catholic Church failed to find in the early fourteenth century before they are all killed.