It is a tradition in this country to look very carefully when someone has great success. Juli Zeh’s novel “Über Menschen” (About People) has been high on the bestseller list for weeks – like several of its predecessors. Currently in second place. In train station bookstores there are mobile shelves just at the cash register with Juli-Zeh books alone. In other words, she is a bestselling author. So what is it about this work?