Book description from Amazon:
5th Book in the Chase Dagger Series -- "Lightning is the least of your worries." -- The Indiana Paranormal Investigators are spending a night in a gothic mansion on the outskirts of Cedar Point, Indiana. Four people are participating, only three remain in the morning. There have been other disappearances and homicides in the past connected with the mansion. And the one common denominator has been the weather. Chase Dagger and his entourage plan to spend a night in the mansion to seek answers. But they get more than they bargain for as another storm builds on the horizon. The Chase Dagger series blends mystery with fantasy, horror, and sometimes sci-fi. Critics call it "MacGuyver meets Dark Angel."
Fatal Storm (Book 5 in the Chase Dagger Series)