The book, The Girl Who Stopped Swimming, is by Joshilyn Jackson. Here's the brief description from the author:
Laurel Gray Hawthorne needs to make things pretty, whether she's helping her mother make sure the very literal family skeleton stays buried or turning scraps of fabric into nationally acclaimed art quilts. Her estranged sister Thalia, an impoverished Actress with a capital A, is her polar opposite, priding herself on exposing the lurid truth lurking behind middle class niceties. While Laurel's life seems neat and on track--a passionate marriage, a treasured daughter, and a lovely home in suburban Victorianna--everything she holds dear is suddenly thrown into question the night she is visited by the ghost of a her 14-year old neighbor Molly Dufresne.The ghost leads Laurel to the real Molly floating lifelessly in the Hawthorne's backyard pool. Molly's death is inexplicable--an unseemly mystery Laurel knows no one in her whitewashed neighborhood is up to solving. Only her wayward, unpredictable sister is right for the task, but calling in a favor from Thalia is like walking straight into a frying pan protected only by Crisco. Enlisting Thalia's help, Laurel sets out on a life-altering journey that triggers startling revelations about her family's guarded past, the true state of her marriage, and the girl who stopped swimming.
To find out more check out both: (1) the author's site www.joshilynjackson.com
and (2) the sponsor site http://chaoticcompendiums.blogspot.com/2009/04/book-giveaway-girl-who-stopped-swimming.html#comment-form