This book is called The Elsewhere Chronicles.  I read this book with my mom.  It was easy to read. We took turns reading it together.  It is a good book because it has a lot of action.  There are four main characters in the book: Noah, Theo, Max, and Rebecca.  Max is smart and brave.  Theo was scared, then he was brave.  One cool thing that happens in the book is that Noah and Theo ride a dragon. One scary thing in the book are the Shadow Spies.  There are six books in the Elswhere Chronicles.  We have read three.  We would like to read the fourth book.