Who is the author of ungrateful dwarf?

There is no widely recognized book or story titled "Ungrateful Dwarf." It's possible you're misremembering the title or author, or it's a lesser-known work.

To help me find the correct information, could you provide more context? For example:

* Do you remember any other details about the story? Like the plot, genre, or setting.

* Where did you encounter this title? Was it in a book, online, or from someone else?

With more information, I can try to help you find the author you're looking for.