《小屁孩日记(套装全3册)》是一本漫画与涂鸦加上文字说明的另类日记。主人公格雷是一个念初中的半大小子。他善良、诚实、聪明、爱玩，满脑子的鬼点子。他的妈妈让他记日记，他除了松散地记述了有趣的或难忘的事情外，还画了许多漫画。在日记里，格雷记叙了他如何驾驭充满冒险的中学生活，如何巧妙逃脱学校歌唱比赛，最重要的是如何不让任何人发现他的秘密。他经常想捉弄人反被人捉弄；他常常想做好事却弄巧成拙；他屡屡身陷尴尬境遇竟逢“凶”化吉。他不是好孩子，也不是坏孩子，就只是普通的孩子；他有点自私，但重要关头也会挺身保护朋友。……总之，那些十几岁孩子常遇到的麻烦事他都毫无例外地遇上了：他的父母不让他打电子游戏，他的哥哥欺负他，他的弟弟总给他惹麻烦，而他学校的女生则认为他不过是浪费她们的时间。

Greg Heffley finds himself thrust into a new year and a new school where undersize weaklings share the corridors with kids who are taller, meaner and already shaving. Desperate to prove his new found maturity, which only going up a grade can bring, Greg is happy to have his not-quite-so-cool sidekick, Rowley, along for the ride. Three famtastic titles in a box set: Diary of a Wimpy Kid, Diary of a Wimpy Kid Rodrick Rules, Diary of a Wimpy Kid The Last Straw.

Book 1: Diary of a Wimpy Kid. Greg Heffley finds himself thrust into a new year and a new school where undersize weaklings share the corridors with kids who are taller, meaner and already shaving. Desperate to prove his new found maturity, which only going up a grade can bring, Greg is happy to have his not-quite-so-cool sidekick, Rowley, along for the ride. But when Rowley's star starts to rise, Greg tries to use his best friend's popularity to his own advantage. Recorded in his diary with comic pictures and his very own words, this test of Greg and Rowley's friendship unfolds with hilarious results.

Book 2: Rodrick Rules. It's a brand-new year and a brand-new journal and Greg is keen to put the humiliating (and secret!) events of last summer firmly behind him. But someone knows everything – someone whose job it is to most definitely not keep anything embarrassing of Greg's private – his big brother, Rodrick. How can Greg make it through this new school year with his cool(ish) reputation intact?

Book 3: The Last Straw. Greg's dad, Frank, is on a mission - a mission to make this wimpy kid, well, less wimpy. All manner of 'manly' physical activities are planned, but Greg just about manages to find a way out of them. That is until military academy is is mentioned and Greg realizes that he's going to have to come up with something very special to get out of this one . . .