Jana DeLeon writes the Ghost-in-Law Mystery series which started in 2009 and is set in Louisiana. It features the ghost of Helena Henry. Helena is the dead mother-in-law to Scientist Maryse Robicheaux. Helena was never well liked in the town of Mudbug and her daughter-in-law was at the top of the list of people who couldn't stand her. The first book features Maryse as a main character. In subsequent books Helena is featured with other woman in the town. NOTE: There are some love scenes in this series.
Books in this series: