Hack, by Peter Wrenshall, is a page-turning young adult novel set in the world of cyber crime. Teenaged computer criminal karl ripley is lonely and isolated, except he has a special skill and he's great at what he does-c...Hack, by Peter Wrenshall, is a page-turning young adult novel set in the world of cyber crime. Teenaged computer criminal karl ripley is lonely and isolated, except he has a special skill and he's great at what he does-computer hacking.