|This article is about the book. You may be looking for the episode.|
|Arthur's Mystery Envelope (book)|
|Author||*Marc Brown (cover credit)|
|Publication date||April 1, 1998|
|Published by||Little, Brown and Company|
| Preceded by|| Followed by|
Arthur and the Scare-Your-Pants-Off Club
It looks like trouble when the principal asks Arthur to take a large envelope marked CONFIDENTIAL home to his mom. His friends try to guess what's inside. It might just be information on... summer school! However, it turns out to be tax documents.