A Path of Stars by Anne Sibley O'Brien (2012)
Dara's grandmother, Lok Yeay, is full of stories about her life growing up in Cambodia, before she immigrated to the United States. Lok Yeay tells her granddaughter of the fruits and plants that grew there, and how her family would sit in their yard and watch the stars that glowed like fireflies. Lok Yeay tells Dara about her brother, Lok Ta, who is still in Cambodia, and how one day she will return with Dara and Dara's family to visit the place she still considers home. But when a phone call disrupts Lok Yeay's dream to see her brother again, Dara becomes determined to bring her grandmother back to a place of happiness.