The House on Oyster Creek by Heidi Jon Schmidt

When Henry, a New York writer, and his wife Charlotte inherit his ancestral home on Cape Cod, they decide to move away from New York to the quiet of the beach.  To renovate the family home, they decide to sell a portion of the land with it to the Narvilles, a rich couple from Georgia.  This opens a big can of worms. The Narvilles seem to think they own all the beach and proceed to run the local oystermen off the beach.  Charlotte feels guilty so she goes all out to research the deeds for the plots and the laws governing the use of the beaches.  The Narvilles actually spend a month a year there, but feels like they need to run the place.   Mrs. Narville has a surveillance camera and even tells Charlotte and her small daughter, Fiona, to stay off "her" beach.

There are several side stories to the search for the true owners of the beach.  Charlotte, who is a lot younger than her husband, is tempted with a romance with a younger local man, Darryl Stead.  The mystery of some of the townspeople and how they came to the island is also explored, especially Ada Town, an eldery lady who showed up at the local church as a foundling.  To tell any more would ruin the story for the reader, but the book is very good and full of surprises. I guess I liked it because I indentified with rich neighbors moving in and trying to tell the rest of my neighborhood how to conduct their lives.