The Meltdown is the 13th book in the Diary of a Wimpy Kid series by Jeff Kinney. In this installment, Greg Heffley faces a harsh winter. When his school is closed due to heavy snow, his neighborhood turns into a snowy battleground. Kids divide into groups and wage epic snowball fights, building forts and declaring their territories. Greg must navigate this frozen war zone, dealing with both the usual middle-school drama and the chaos outside. The book blends humor and action as Greg tries to survive one of the coldest winters he's ever experienced.