In his gripping new Young Adult novel, Hack, Peter Wrenshall gets at the heart and soul of the teenage computer criminal. Karl Ripley is lonely and isolated. His mother works the late shift at the local casino, and to while away the time, he begins to hack into other people’s computers. At first it’s fun and exciting, and by the time he’s sixteen, he breaks into the Pentagon computers, an act that the FBI calls the biggest military hack ever. But then Karl’s friend turns him in, an act of betrayal that has Karl obsessed with revenge.