Rating: 

From the back cover of the book:
"As you follow Yago and his hacker buddies in their fight against crackers, the bad guys of the internet world, you'll learn
* How Internet technologies work
* How some people try to hurt others online
* Key ways to protect yourself
* How people can work together on the Internet to make the world a better place"

I think the book fails on the topics of how the internet works and how to protect oneself. There are references in the book to resources on the Hackerteen website with some additional information... making the book a companion to the web site.

Let's wait to see what real teens have to say about the book. If you know a teen how read the book, please encourage them to write a review!