Girls Rule! was a comic made by two girls named Tabitha Cutter and Lisa Russel that Greg Heffley found and read. The comics shows two girls, based off of the authors themselves, saying "Girls Rule!" after a boy trips. There was also a Girls Rule comic in the Do-It-Yourself Book. Greg deemed this comic inferior to his own and listed it under a section of the book where he posted comics that would most likely fail against his.