Other books I would suggest include:
The Great Brain by John Fitzgerald
The Pain and the Great One by Judy Blume
Tales of a Fourth Grade Nothing by Judy Blume
Hoot by Carl Hiaasen.
Let me know if we can be of more assistance.
There is another author that you might like. I think his books are
hilarious. His name is Daniel Pinkwater, and he has published many
humorous books. Here are some of his books that you might like: