A moving and timely story of a young boy separated from his beloved brother and father by a border Arturo loves to look at maps and the lines where different countries meet--as if greeting each other with a big hug. But his mother tells him these lines have a different purpose--to keep people from moving freely across the land. Arturo and his mother are separated from his father and his brother Antonio by one of these lines. Will he ever see his brother again? But the sky has no lines, so Arturo dreams of flying with Antonio through the open sky to the moon, free of barriers. Artful, moving watercolor illustrations express a young boy's sorrow at separation and his joyful dreams of a world without lines.