In media res is a literary device that means "in the middle of things."
Answer:
I assume you meant to ask, "What is a simile <em>in </em>"The Hands of an Angry God." So, one example is the simile in which the author compares God's wrath to a terrible flood (“The wrath of God is like great waters that are dammed for the present...”).
Answer:
A the person is persistant