Redshirts

 Ensigns on a spaceship are aware that something is wrong, as no one wants to go down on missions. Why ? Because ensigns going on missions die often. So often that the new ensigns we find are trying to find out why. They discover that they are in a tv show, that's when "the narrative" takes over.  So they decide to go back in time to when the TV show was running. They explain what's happening to the creators, and help out also the creators with one of their son in the comma. This makes our ensigns living more normally. The books end by following 3 people "in the past" affected by knowing about fiction affecting reality and vice-versa. 

 The book was well written. The content though read a bit like a first novel. The whole meta thing is very very discoverable and it feels a bit easy. That being said, it's a very very entertaining book.