It’s Greg’s birthday—and you’re invited to the chaos. In Partypooper, the 20th book in Jeff Kinney’s global smash-hit Diary of a Wimpy Kid series, Greg Heffley is planning the ultimate party—for himself.

But when the guest list grows, the decorations flop, and the surprises backfire, this birthday bash turns into a total blowout—just not the kind Greg had in mind.

Packed with cake disasters, family fiascos, and classic Wimpy Kid humor, this book is perfect for readers ages 8–12. 

Collect all the books in the #1 bestselling Diary of a Wimpy Kid series: Diary of a Wimpy Kid (#1) | Rodrick Rules (#2) | The Last Straw (#3) | Dog Days (#4) | The Ugly Truth (#5) | Cabin Fever (#6) | The Third Wheel (#7) | Hard Luck (#8) | The Long Haul (#9) | Old School (#10) | Double Down (#11) | The Getaway (#12) | The Meltdown (#13) | Wrecking Ball (#14) | The Deep End (#15) | Big Shot (#16) | Diper Överlöde (#17) | No Brainer (#18) | Hot Mess (#19) | Partypooper (#20) | Fight or Flight (#21)

See the Wimpy Kid World in a whole new way with the #1 bestselling Awesome Friendly books, told from the perspective of Greg Heffley’s best friend Rowley Jefferson: Diary of an Awesome Friendly Kid: Rowley Jefferson’s Journal | Rowley Jefferson’s Awesome Friendly Adventure | Rowley Jefferson’s Awesome Friendly Spooky Stories