Synopsis: The third book in this genre-busting series is certain to enlarge Kinney's presence on the bestseller lists, where the previous titles have taken up residence for the past two years. Kinney's spot-on humor and winning formula of deadpan text set against cartoons are back in full force. This time, Greg starts off on New Year's Day (he resolves to "help other people improve," telling his mother, "I think you should work on chewing your potato…