The Sweeney Sisters by Lian Dolan

Liza, Maggie, and Tricia are the daughters of famous American writer William Sweeney. When he passes away, they reunite at the family home in Connecticut to sort out his affairs. Liza, the oldest, lives with her husband, Whit, and their teenage twins. Middle daughter Maggie is an artist who has floundered as an adult. Youngest Tricia is a successful lawyer in New York. While mourning their father and trying to unearth his memoir (due to his publisher), the women learn that they have another sister, Serena, whom William learned about a month before he died. The Sweeney Sisters is the story of the four over the course of a summer as they come to terms with the secret, bond, and move forward. An engaging novel, perfect for fans of Elin Hilderbrand and readers who love novels about family relationships.