The book wasn't banned, but... seems like an odd pick for a challenge in the first place.

From the Salt Lake Tribune:

  "What we normally don't consider pornography, a child may get sexually aroused by," he said. "The question to me is not whether the book has a good story line, but does it sexually stimulate young boys?"

    He said seemingly innocuous images such as lingerie ads and swimsuit editions of sports magazines - and graphic illustrations in books - can launch a child on the road to hard-core addiction.

The book causing the trouble?  Voyage of the Basset.