Okay, I have to fess up and admit that I didn't realise this was written for a late teen audience, and that sadly I no longer fall into this target age range (I picked it up it simply because I'd been meaning to read a Doctorow novel for some time). So I can only express my views as an older reader.
For the most part I agree with the sentiments expressed in this novel. I'm also something of a geek so the technology referenced in the text is familiar to me. I'm not sure, however, that I recognise the young adults who feature in the book. They're all a little too sassy and cool to ring true. I also had some difficulty believing their actions. But maybe these observations are age-related. Perhaps younger readers will connect with these kids. The story just about keeps the pages turning but it's all a bit underwhelming, and the technological explanations serve only to interrupt the narrative flow (but then again, maybe the didactic tone is commonplace in teen novels). There's nothing terribly wrong with this book but there's nothing exceptional about it either. All-in-all it's a solid but unremarkable read.