There are in total six Diary of a Wimpy Kid books, each of them treats a specific topic:
- The first book, Diary of a Wimpy Kid is about Greg, Rowley, and the Cheese Touch.
- The second book, Diary of a Wimpy Kid: Rodrick Rules is about Greg, Rodrick, the Mom Bucks program, and the school talent show.
- The third book, Diary of a Wimpy Kid: The Last Straw is about the conflict between Greg and his father, Holly Hills, the soccer team, and Spag Union Military Academy.
- The fourth book, Diary of a Wimpy Kid: Dog Days is about Greg's bad summer vacation, his mom, and their new dog, Sweetie.
The fifth book, Diary of a Wimpy Kid: The Ugly Truth is about Greg and Rowley's disfriendship, his great-grandmother Gammie, puberty, and his Uncle Gary's engagement.
- The sixth book, Diary of a Wimpy Kid: Cabin Fever is about his brother Manny, the playground, accidental vandalism, Christmas, and the blizzard.