Diary of a Wimpy Kid: The Ugly Truth is a 2010 bestselling children's fiction book by American author and cartoonist Jeff Kinney and is the fifth book in the Diary of a Wimpy Kid series.The Ugly Truth sold 548,000 copies in its initial week of publication.-This story begins with Greg explaining that since he and his best friend Rowley have had a big fight in the previous book, their friendship has been "history".Susan Heffley, Greg's mother, announces that she will be going back to college for a few months in order to stimulate her mind. As a result, the Heffley men must take care of themselves, and most stability falls apart. Food is often ruined, and since Susan usually does the chores around the house, Greg is short of clean clothes to wear.