So much fun!!! I absolutely loved it. My kids could not put it down. The author handed out bookmarks at a signing that we went to. It was a decoder key that had clues to solve a mystery within the book and also included coordinating activities. The other thing that really sold us on this book was Chapter 4, Elaina's Reading Day. In this chapter there are three separate stories, Pigletta Curlypig and the Tiny Pig Fairy, Caked (which includes actual recipes), and Under the Dinning Room Table. Stories that are not about sleuthing, but read to and by some of the main characters. It was packed with surprises and my children have read it over and over again, cover to cover. Crazy and interesting fact: Elaina R. D'Angelo, the main character, actually went on to publish her own book at the age of ten! The Magic Book of "E" just came out in 2010. Another one my kids can't put down. She is an inspiration to children everywhere!