The book I'm currently reading is "Code Name Verity" by Elizabeth Wein. The main character is "Verity." I have just started this book, but as far as I am reading, Verity is a spy that has just been captured by Nazis. Verity is confessing what she has done inside the book. Wein makes Verity has an "I'm gonna die anyways so I can do whatever I want to now" attitude.
On page five she states that she's gonna be shot anyways so she might as well just do anything she wants to (the quote above). The author makes Verity have this sort of attitude to make the reader think that Verity gives up.
The fact that Verity is a spy, and she is giving up, makes the reader question the book. Spies aren't supposed to give up. They are capable of lying until death to accomplish their mission. This makes the reader infer what will be happening throughout the story.
This is just the beginning of the book. There is much more to read about. It would be logical to think that there will be more than just one confession throughout the book, since all of this is going on in just the first five pages.