When powerful Minneapolis art critic Hale Micklenberg is murdered, there aren't too many mourners. A master of the bad review, Micklenberg was bad news for a lot of people.Food critic Sophie Greenway is nonetheless troubled to learn that her college-student son could be involved in the murder. But so could a host of others -- including Hale Micklenberg's artworld colleagues, various so-called friends, and the not-so-bereaved widow.