HIDDEN LEAVES. (V.Andrews)

After the tragic death of her adoptive father, Willow De Beers receives an unexpected gift: a family diary that unlocks all the secrets of her world -- and shatters the life she's known in glitzy Palm Beach, Florida. At last, Willow learns the identity of her real father, and unearths his secret love affair with her real mother. She discovers the reasons for her adoptive mother's cruelty...and the truth about the mysterious woman who couldn't keep her but would love her forever.