** spoiler alert ** 
 This book made me so ridiculously angry. Like ANGRY!!!!! 13 books and no answers. None. I absolutely loved the entire series and thought the whole journey through the first 12 books was amazing. Then I was well-prepared to have all of my own theories tested in the last book, but how disappointed I was when I realized my own theories would have to suffice. I am really not exaggerating when I say that you don't get answers to all of the questions that pile up throughout the series. The letters that are introduced and talked about are left unanswered The reason behind everything is left unsolved. Everything builds up and then the author doesn't finish the story. Some may say this is what makes the series as good as it is, but come on. I feel like that is just laziness on the author's part. Yes, the reader should be engaged and left to their own devices on certain things, but I don't believe they should be left to answer everything for themselves. Especially young readers. I don't know, that's just my opinion. Maybe I should go back and read them again, but I am still so angry with the last book that I feel like I never will.