Andy Griffiths and terry Denton
This is sort of for younger readers but it still makes me laugh! A younger reading level and crude humor, but funny nonetheless. (Not crude in an inappropriate way, just crude in a explosions and other dumb stuff way.) This story is about 2 kids who live in a treehouse, and every book they add another 13 stories. I remember loving this book in 2nd grade, and I still do now.