The Secret Keeper by Kate Morton: During a party at the family farm in the English countryside, sixteen-year-old Laurel Nicolson has escaped to her childhood tree house and is dreaming of the future. She spies a stranger coming up the road and sees her mother speak to him. Before the afternoon is over, Laurel will witness a shocking crime that challenges everything she knows about her family and especially her mother, Dorothy.

The Secret Keeper is historical, slightly creepy and mysterious, and shows how secrets can reverberate across generations in families.

Some other books that have similar themes include:

The Alphabet Sisters by Monica McInerney
As girls growing up in Clare Valley, Australia, Anna, Bett, and Carrie Quinlan were childhood singing stars known as The Alphabet Sisters. The unbridled enthusiasm of their flamboyant grandmother Lola was the glue that held them together. As adults, though, the women haven't spoken in years.

Five Quarters of the Orange by Joanne Harris
When Framboise Simon returns to a small village on the banks of the
Loire, the locals do not recognize her as the daughter of the infamous
woman they hold responsible for a tragedy during the German occupation
years ago.