RETAIL PRICE $19.99 OUR PRICE $15.99 - Studious good girl Auden, named for the poet, makes a snap decision to spend her summer before college at her father's beach house rather than with her mother, a professor whose bad habits include male grad students. Auden's parents divorced three years earlier, a split she's not yet over. Her remarried father has already produced another heir, a colicky baby named Thisbe (after a tragic figure from Shakespeare), with his young wife, Heidi, who owns a boutique. Feeling sympathy for stressed-out Heidi, Auden agrees to do the shop's bookkeeping, providing her with an instant social circle-the teenage clerks plus the boys from the neighboring bike rental, including hunky, wounded Eli. Both night owls, Auden and Eli bond when he coaxes her to experience childhood activities-bowling, food fights, learning to ride a bike-that her insufferable parents never bothered to provide. Auden's thoughtful observations make for enjoyable reading-this is solid if not "top shelf" Dessen: another summer of transformation in which the heroine learns that growing up means "propelling yourself forward, into whatever lies ahead, one turn of the wheel at a time."