Yesterday's Leftovers, Chapter 7, The Bagman And The Mechanical Camel

This is a post-apocalyptic science fiction adventure story. With robots! That takes place in the far future. Set inside of buildings the size of continents that stretch into the sky. The people that live on top are called the Uppers, they call the shots. The people that hide below are called the Lowers. This story follows a young man living in the lowers.