This is a novel about first world problems: Lucy is a highly-regarded pianist who stopped playing when her grandmother died last year. Her family is in the 1% in San Francisco: mom, dad, grandfather, all manage the careers and the money, her little brother is now competing and performing. Lucy's best friend's parents are going through a nasty divorce.
Zarr has some lovely things to say about art and music, but the plot, the characters (there's an Asian male friend, too), the angst all feel predictable. The writing is good, but I was hard pressed to care about Lucy's problems. I'd read Zarr again.