Diary of a Wimpy Kid The Last Straw

"I thought this book was brilliant, I read it really quickly and laughed out loud, a lot.  It's about a boy whose life is always messed up, usually by his football teacher or his dad.  At one point he loses his contact lenses so he has to wear glasses and then meets the girl he has a crush on and gets embarrassed because she thinks he's a little annoying boy.  In another part a baby repeats a swear word that he hears from his big brother (you don't actually get to see exactly what the swear word is though!).  The big brother gets into real trouble as a result of this.  Then they set up a swear word jar, which they have to put money in every time they swear.