There is no known author named "Jagatarma." It's possible there is a misspelling or an unfamiliar name. To help me find the author you're looking for, could you please provide more information? For example:
* Is this a real name or a pen name?
* What genre does the author write in?
* What are some of the author's works?
* Where did you encounter this name?
With more information, I can try to find the author you're looking for.