What has the author Ernest R Trattner written?

There appears to be no author named Ernest R Trattner. It's possible there's a typo or a misunderstanding.

Could you please double-check the name and provide any other information that might help identify the author you're looking for, such as:

* Full name: Is it Ernest R. Trattner, or a different variation?

* Genre: What type of books did this author write?

* Era: When were the books published?

* Any specific titles: Do you remember any book titles by this author?

With more information, I might be able to help you find the author you're looking for.