Who is the author of legend watermelon?

There is no widely known book or work titled "Legend Watermelon." It's possible that you are thinking of a different title or the name is a misremembered phrase.

Could you provide more context or information about the book or story you're referring to? For example:

* What is the genre of the book? (fiction, non-fiction, etc.)

* What is the story about?

* Do you remember any other details about the book or author?

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