I'm still reading Red Sky at Morning whose hilariousness cannot be adequately conveyed sans context, so you'll just have to trust me that this is a very funny book.
Here's the teaser:
"She spends every summer at a church camp in Colorado. She comes back with a tan and the scroungiest jokes I ever heard. This year she brought back a song called 'Ring Dang Do' that would make your hair turn white."
Does it help to know that Harper Lee wrote the blurb on the cover of my copy from the library?