How does Antoine de Saint-Exupery use imagery in Wind, Sand and Stars?

The imagery is related to the era and setting of the narrative. Antoine is a pilot and a student of human nature living in France in the late 1930s. The book takes place in a number of places reachable by plane along the Aeropostale routes in the late 1930s. The pilots are all from France and set out from there to places all over the world, including South America, Africa, the Middle East, and the mountain ranges throughout Europe. There is, as a result of the profession of the main characters, a good deal of the story told from inside the planes themselves. Outside the planes, however, the story takes the men to fascinating places. The story of Guillaumet takes place in the Andes in the bitter and snowy cold of winter, Mermoz's story is in South America and the Andes; all the stories in the desert take place in the Sahara, and the stories about Barcelona and Madrid span small villages in the area to trenches of war to sealed-tight drinking and sleeping rooms from whence no light can show through.