Acting on fake predictions creates real trouble:

One of the most memorable plot points that showcases Jeff Kinney’s brilliant writing is the "Cheese Touch" equivalent of this book: the word "Lög." When Greg’s younger brother, Manny, learns a bad word, the parents try to intervene. Frank Heffley (the dad) tries to trick Manny into saying "Lög" (meaning "luck" in a made-up sense) instead of the swear word, but the plan backfires spectacularly.

If Diario de Greg 1 was about surviving peers, Diario de Greg 2 is about surviving family. Specifically, it is an exploration of the eldest Heffley child: Rodrick.

Aunque sigue siendo una comedia, vemos un poco más de la vulnerabilidad de Greg y la peculiar lógica de Rodrick. Adaptación al cine