This is a nonstop thriller, and can be read by anyone, boy or girl. I read the first one, and then I was hooked. I finished the series, and I have introduced a couple to the series. One of them finished the first two in a day or so, and she too is hooked. I have never read a book that is so good, and has a great story line. I think DJ Machale, the author, wasn't expecting so many people to read and love his books. This is a 10 out of 5.