Butterfly Yellow by Thanhha Lai

In the final days of the Việt Nam War, Hằng takes her little brother, Linh, to the airport, determined to find a way to safety in America. In a split second, Linh is ripped from her arms—and Hằng is left behind in the war-torn country.

Six years later, Hằng has made the brutal journey from Việt Nam and is now in Texas as a refugee. She doesn’t know how she will find the little brother who was taken from her until she meets LeeRoy, a city boy with big rodeo dreams, who decides to help her.

Hằng is overjoyed when she reunites with Linh. But when she realizes he doesn’t remember her, their family, or Việt Nam, her heart is crushed. Though the distance between them feels greater than ever, Hằng has come so far that she will do anything to bridge the gap.