International bestselling author Jeff Kinney serves up heaps of laughs in Partypooper, the 20th book in the Diary of a Wimpy Kid series.You're Invited - RSVP for Fun! Over the years, Greg Heffley has chronicled his mishaps and misadventures in a series of diaries - make that journals - but book 20 of the Diary of a Wimpy Kid series, Partypooper, really takes the cake!Expect gobs of fun and over-the-top antics as Greg throws an epic birthday party for none other than himself.So come celebrate and laugh alongside Greg, his family, and the entire world of Wimpy Kid fans.