In this fourth volume of the series, Greg Heffley turns 13 years old, and appears to have the worst summer vacation compared to everyone else.

In Other Languages

Language Title
French Journal d'un Dégonflé: Ça Fait Suer !
Spanish Diario de Greg 4: Días de Perros
Portuguese Diário de um Banana 4: Dias de Cão
Japanese グレッグのダメ日記4
Korean 윔피키드 4: 여름 방학의 법칙

In Other Countries

Country of origin Language Release date
Japan Japanese November 2009
South Korea Korean November 11, 2009
Latin America Spanish August 15, 2010
UK English February 3, 2011
France French March 3, 2011