Experiment in terror is an awesome horror series of novels by Karina Halle. Perry Palomino and Dex Foray are the protagonists of the series who are ghost hunters. They actually film haunted places for their internet show but as both are like magnets to the dead so they go through a lot during every episode.
The way Karina carries out their love story episode after episode along with the horrible dead ghosts, poltergeists and demons playing tricks with them is marvelous. Series is worth reading and enjoying.
I am adding some pictures along with the complete list of novels.