Any one know this book?

In 1990 I ran across a book in the Columbia book store.
It was a book for English Language Learners, and consisted of short humorous passages by different authors. After each passage there was a discussion on why the passage was funny under the heading of "Getting the Joke." I even remember that one of the passages was by Garrison Keillor called "Living Flag." The only thing I don't remember is the title of the book.

Does this description ring a bell to anyone?

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[Tdol]

Notto me, but the Garrison Keillor story is in this book:
http://www.usingenglish.com/amazon/us/156511325X.html