When the Spirit Moves You

"Jeff Resnick's curiosity is piqued when he sees a sign advertising psychic readings. At first he's sure the medium is a fake, but then his funny feelings lead him to suspect that a murder has taken place in the dilapidated house where Madam Zahara holds her readings. Just who died and how? And why is Jeff compelled to look for bodies buried in the medium's yard? — description of story from Amazon.com