Remind yourself it's fiction: after a terrorist attack, the DHS goes police state on San Francisco. That part's all too believable. The less-believable part: our hero is a teenaged computer programmer; he's better at computer programming than pretty much anyone I know. He doesn't do anything in particular that you haven't heard of someone doing… but he's simultaneously expert at programming services, defeating computer security, defeating real-world security… sort of a teenage hacker as trickster god. A fun read; bonus puzzlehunt points for having a puzzle-y ARG as a plot point; inspiring a puzzle hunt in San Francisco; and for listing Seth Schoen in the acknowledgments.