John, AKA Number Four, has joined forces with Six and now the charm is broken, they are no longer protected. Instead, with the help of John’s human best friend, Sam and his shape-shifting dog, they are devising a plan to defeat the Mogadorians. But first they need to evade the evil aliens, who seem to be everywhere. Meanwhile, halfway around the world, Number Seven, AKA Marina of the Sea, has her own problems but she is certain that John is Loric and is desperately trying to figure out how to contact him.
The Power of Six was much better than the first book, I Am Number Four. There were more characters, which made the story more interesting, and we learned a bit more about the deeper story. Also there was lots of action, which was exciting. I recommend The Power of Six as a good read and I am looking forward to reading the next book in the series, The Rise of Nine.