The Kill Order by James Dashner - The prequel to the fabulous Maze Runner series, where MANY questions that you want answered, are answered! While it’s a prequel, I still think that reading the series, then this book last, is a great way to do it.
It killed me when you defended someone who didn't love you as selflessly as I did. Letting you go was the hardest thing I've ever done, but I hope you won't make the same mistakes with the next girl. I just wish you had made them with the girl before me.