In my opinion, I really LOVED this book. One reason why is throughout this whole entire book, almost every chapter left lots of suspense. Another reason why is there is lots of action adventure during the whole entire book, Only getting better the farther into the book you go. Action adventure and mystery combined!? What a treat! The last reason why is that get this, the spies are just middle school kids, doing all the stuff a regular adult spy would do.  My favorite part is the last action adventure part. As I said, The action adventure get better throughout the book. You might like this book if you like Mystery and/or action adventure. You should read this book because every single scene being one of the two of two awesome kinds genres, by the way they are my two favorite. Just combine them and it makes something unimaginable.