From master storyteller and Printz Award-winning author An Na comes a dark, intensely moving story of a girl desperately determined to find a cure for the illness that swept her mother away, and could possibly destroy her own life as well. Sixteen-year-old Grace is in a race against time--and in a race for her life--even if she doesn't realize it yet... She is smart, responsible, and contending with more than what most teens ever should. Her mother...