This is a fabulous book for a read a-loud. There are parts of a "message" at one point in the book that can be written on the board for the students to literally see and help decipher. I would recommend this book for 4/5, especially gifted students.My class is actually writing sequels, as we anxiously wait for the sequel, People of Sparks. We are also, using the book as a theme for our end of the year party.