>>Anything by Beverly Clearly.
>>The "Fudge" books by Judy Blume.
>>
>>This isn't as good literature-wise, but my kids loved a series about "The Plant that ate Dirty Socks." I don't remember the author, but if you can't find it, I can look on the bookshelf.
>>
>>Tamar
>
>I'm surprised nobody has suggested the Dr. Seuss series - "The Cat in the Hat", "Green Eggs and Ham", etc. My kids loved those.

He read almost all of them already...