One of Those Hideous Books Where the Mother Dies by Sonya Sones
Ruby has turned her grief into anger at her father: because he divorced her mother before she was born, because she has had to leave her best friend Lizzie and her boyfriend Ray to come to Los Angeles to live with him, and because he is Whip Logan, a very famous and rich movie star. She turns a cold shoulder to all his gentle and persistent attempts to relate to her, sneers at the glamour of his Beverly Hills mansion and famous friends, and spends most of her time writing desperate emails to Lizzie and Ray, and her dead mother, from her Dream Bedroom. The friendship of Max, Whip's live-in assistant/personal trainer, is some comfort, and Ruby has a harder and harder time keeping her sneer as Whip ups the ante, from rides in his classic vintage cars, to shopping trips for anything she wants, to weekends in Las Vegas and Catalina and a party where Eminem is the guest of honor. But an earthquake leads to a surprising revelation that changes everything for Ruby, in an enormously satisfying ending.