Diary of a Wimpy Kid: The Third Wheel is the 7th book in the Diary of a Wimpy Kid series. The book was officially released on Tuesday, November 13 2012. The book covers the months from January to February. The book's 7 page sneak peek was released in September 2012. Gary Heffley is the main antagonist of this book, even though he is not evil, and this is one of the only books to based on a specific event, mainly the Valentine's Day Dance.