This is one of Barbara Michaels' classic ghost stories, a little bit reminiscent of her very popular Ammie Come Home. Pat Robbins and her son Mark live in an old house which use to be in the middle of nowhere when Pat and her late husband bought it, but is now surrounded by new estates. The only other old house is right next door, a house built at the same time and as a a mirror of theirs (the two houses were built for two sisters and their families).
The house next door has stood empty for years, until it's bought by Josef Friedrichs and his daughter Kathy. Mark's immediately out there trying to meet the very attractive Kathy, but is rebuffed by the very stiff-necked Mr Friedrichs. Until it becomes clear to all of them that some sort of supernatural presence is after Kathy, and then all bets are off.
One of my favourite elements in Michaels' books is the group of people working together to figure out some sort of supernatural mystery, and we definitely have that here. The ghost's activities are pretty undeniable, so there isn't a lot of doubt about what's going on, and Pat, Mark, Josef and Kathy are soon a team. I loved the way they dig around trying to figure out things, led by Mark (to Josef's disgust!), whose seemingly out-of-the-blue deductions seem to come true with suspicious frequency.
The dynamics in the little group are interesting. Mark is a bit of a know-it-all and completely convinced of the rightness of his theories, impatient with the others for not following along quite as quickly as he would like. It's mostly because he cares so much about solving the mystery and "saving" Kathy, but part of it is just the arrogance of the young male. His personality bugs the hell out of Josef, in a way that was partly completely understandable, but also a bit dated (the book is set in the late 70s). Kathy and Pat's roles are a bit dated as well, as they are relegated to a fairly secondary role in the investigation and mostly follow Mark lead. Although, so does Josef, so maybe it's not quite as dated as it seems! Anyway, by the end they've ended up as a family, with all the bickering and love involved in that.
The story that they uncover in their investigations is really quite interesting, as they quickly zero in on events that took place during the Civil War. One of the sisters married an abolitionist, while the other one's husband was a Confederate, and the picture we get Maryland during the 1860s, right on the border between North and South, was super interesting.
The resolution is well-done, too. Surprising, but in a believable way (in hindsight the clues were all there), and very chilling.
This was fun. A B+.