Diary of a Wimpy Kid: The Last Straw is a novel written by American author and cartoonist Jeff Kinney, the third book in the Diary of a Wimpy Kid series. The book acts as a journal and follows the adventures of Greg Heffley, the narrator of the book, who is in the second half of his seventh-grade year.[1] This book was released in the US on January 13, 2009.