Diary of a Wimpy Kid: The Last Straw (Book 3) by Jeff Kinney

The third laugh-out-loud book in the bestselling phenomenon that is the Diary of a Wimpy Kid series.

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 .