It's a new school year, and Greg Heffley finds himself thrust into middle school, where undersized weaklings share the hallways with kids who are taller, meaner, and already shaving. The hazards of growing up before you're ready are uniquely revealed through words and drawings as Greg records them in his diary.
《小屁孩日记》是美国畅销儿童漫画，故事的主人公格雷是一个念初中的孩子，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，他除了松散地记录了一些生活琐事之外，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。