This is the sequel of I am Number Four. I liked both books but I was especially pleased by this one. It follows the stories of Number Four, John Smith who is on the run with Six, Sam and his Chimaera in the USA and Number Seven, Marina who is living in a monastery orphanage in Spain. There is a lot more action and suspense in this book compared to the first one. More of the members of the Garde meet and they appear to be getting stronger. The worst part of the book was the cliffhanger ending. I can't wait for the third book!