If you put George Orwell's 1984 in a blender with the movie Hackers, and threw in a little terrorism to start things off on the wrong foot, Little Brother might come out the other end. But lighter.
I wanted more from the book. 1984 frightened me, Little Brother didn't. Because the antagonist was the Department of Homeland Security, the conflict felt too far removed from the main character, Marcus, and never seemed like an immediate threat. Potential for discovery of Marcus' creation of the XNet existed, but never even developed as a legitimate threat.
Despite that, I enjoyed the read. I'd give it three stars out of five.
Little Brother is available free from several sources under a creative commons license. If you desire, you can take the book and rework it in any manner you please, as long as you don't sell the resulting project.