This was literally me is An Ember in the Ashes and A Torch Against the Night by Sabaa Tahir. Because of the paranoia caused by Red Queen by Victoria Aveyard, I guessed the plot twist of A Torch Against the Night.
Or when they don't know their favorite character is about to die because they really aren't and you tell them they are and they believe you. It's the most hilarious thing in the world. except it was the book I was working on.