I liked this book even better than [b:Ultraviolet|8843789|Ultraviolet (Ultraviolet, #1)|R.J. Anderson|http://d.gr-assets.com/books/1338688532s/8843789.jpg|13718670], and I'm hoping teens will agree with me -- this is a terrific series!Tori, who seemed to be a major annoyance all through Ultraviolet, even though she wasn't even there much of the time, really comes into her own in this volume. And what a great heroine she is! On the run, unable to trust anybody at all outside of her immediate family, she still manages to make a life for herself, and even....OK, you knew I was going to write "find love?" Well, it's not quite that simple. I don't want to spoil the book -- it is awesome -- but I will say that R. J. Anderson introduces a new hero, and he and Tori make a wonderful team. But if you want to find out how -- and I really hope you do! -- you've got to read the book.I think you will like it if you like "Dr. Who," and it has some "Roswellian" echoes as well. And I feel that it's OK for me to say that much, because you probably will have gathered that it's SciFi, with a strong realistic streak.I can't say whether it stands alone -- I think it could, but I also think you'll probably want to read Ultraviolet first. Because that book is awesome, too!