Who wrote the jewel of world?

There is no book or work of art known as "The Jewel of the World". It's possible this is a title you've come across in a specific context, like a story or a game.

To help you find the author, could you please provide more information? For example:

* Where did you encounter this title? (book, movie, game, etc.)

* What is the general theme or genre of the work?

* Do you remember any other details about the story or characters?

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