The Castaways by Elin Hilderbrand

I enjoyed this book very much. The title refers to the name a woman gave to her group of four couples who live on the island of Nantucket. The book opens with the drowning deaths of one of the couples. During the rest of the book we find out what the relationships are (and were) between the eight people. I liked the way Hilderbrand peeled away the layers of the story. As with most books and with all people - everyone has a secret or two hidden away! There is also the mystery of the drownings - was it intentional or an accident?