I must say that the first book was pretty much only the beginning, and I only wish that it wasn't as lengthy in it's storytelling of Four/John Smith, because there are all the other Lorics to write about. 
 Luckily, in the second book, we get to read more about them, and the tone and pace of this book was more suited to my liking. 
 There's the thing, now instead of just getting John's 1st person POV, you now get another of the group's 1st person POV, and that is of a girl named Marina. 
 At first, I was turned off by the idea of a second POV, and also because of where her storyline was going, but as I went on, I started to really like how things were progressing, which is very different from where John's POV is going. 
 What's cool is that both storylines are really refreshing compared to the first book. And I like how the author switches from John's story back to Marina's story. It can be a little confusing trying to figure out whose POV you're reading for the first sentence or two, but it's a minor issue and really nothing to be concerned over, especially considering how well both person's story is. 
 You get to read a lot more about their legacies, the Mogadorians, the other alien creatures, John's relationship with Sarah, Six, Sam, and even Bernie Kosar (you have to love that "dog.") 
 There's definitely a lot more action and intrigue going on this time around, and I think it would be fair to stay that it's probably more than twice as much as was in the first book. I like action in this type of story and it really got my heart pumping, especially because that's when you get to really understand the power of their legacies.