Mihalik sent this follow-up:
Here's a link to the article I mentioned today regarding Books Are Fun:
http://www.publishingcentral.com/articles/20030323-1-6d76.html
The article is kind of old, but I was successful contacting Tim using the information in the last paragraph of the article.
Also, here's Imagine Nation's website:
http://www.imaginenationbooks.com/
And Books Are Fun (now owned by Reader's Digest):
http://www.booksarefun.com/