This book was absolute fun.
We have widowed Alva-the papers have written nasty things about her and people believe them to be true. The truth is she left an abusive marriage. She comes back to America to restore a crumbling mansion which everyone believes to be haunted. Alva is to sensible to believe it.
We have scientist/Professor Samuel Moore who's family are also scientists and inventors. He's intruigued by Alva and jumps at the chance to find out if it really is haunted by ghosts.
Sam tries very hard to court Alva and she refused because she doesn't want him involved in her "scandals".
I did find their relationship interesting. Together they discover the ghosts and the horrible consequences of possession.
I really liked Sam's family and the banter and obvious love they have for each other.