Hvem er forfatteren av utakknemlig dverg?

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 eksempel:

* Do you remember any other details about the story? Som handlingen, sjangeren eller settingen.

* Hvor møtte du denne tittelen? Var det i en bok, på nettet eller fra noen andre?

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