In media res:
Beginning a narrative in the middle of the action.


Example:
""It's official" Harley said. "They killed the last Berliner two nights ago. You're the last." Then after a pause: "I'm sorry."
-The Last Werewolf by Glenn Duncan

Explanation:
Duncan uses in media res to start his novel for many reasons. First, it adds suspense and makes the reader interested to read more. It starts right in the action of someone apologizing, which foreshadows something bad has or is going to happen, which leaves the reader on their seat. In media res helps Duncan set up the characters and situation quickly and swiftly. Lastly, it sets a mysterious and even occult tone/mood for the novel, and makes the reader foreshadow what events have and will happen.