Diary of a Wimpy Kid: Partypooper - Jeff Kinney

Diary of a Wimpy Kid: Partypooper is the twentieth book in the global smash-hit series by Jeff Kinney. Released on October 21, 2025, the novel centres around Greg Heffley’s birthday drama, his obsession with obtaining a ultra-rare trading card, and an accidental side hustle.

📖 Summary at a Glance

• The Forgotten Birthday: Greg expects a massive milestone surprise party for his birthday, but he wakes up to total silence—his family has actually forgotten his special day. When the sad story goes viral on social media, his embarrassed parents are forced to scramble and throw a hasty blowout party to save face.
• The Party Blowout: Greg tries to take advantage of the situation by planning the ultimate bash for himself, subtly ensuring only wealthier guests are invited so he can rack up expensive gifts. However, the guest list quickly spins out of control, the decorations flop, and the entire event is totally ruined when a wild deer living in the neighbour's overgrown grass crashes the party.
• The Hunt for the Theeble: Amidst the birthday chaos, Greg becomes obsessed with tracking down a rare, highly valuable MicroCreatures trading card known as the Three-Eyed Theeble.
• Manny Ruins the Prize: Through a stroke of luck from Aunt Nancy, Greg finally gets his hands on the valuable original card and hides it from his little brother. However, the card is ultimately rendered completely worthless when Manny draws a dinosaur directly onto it.
• The New Business Venture: Despite his personal birthday being a complete catastrophe, the father of a new kid at school recognizes Greg from an accidental party-crashing incident. Impressed by Greg's chaotic energy, the father pays him good money to host his son's upcoming birthday. Recognizing a massive financial opportunity, Greg and his best friend, Rowley, officially launch a successful party-hosting side hustle.