Trouble is What I Do (Point Blank)"Ben Perkins is back It feels so good to say that. Twenty three years ago, when Rob Kantner introduced his Detroit PI in the short story "C Is for Cookie," he probably had no idea he was heralding in a new era of mystery fiction. Before Rob, the private eye genre was glutted with down in their luck losers who wore trench coats and talked like Bogart. Stereotypes ruled the paperback racks, and a revamp was sorely needed. Rob's genius was to give his