I grew up in Beirut, Lebanon. When i was in fifth grade I read Malkhas' book Zartonk during my summer vacation and I never stopped reading it after that. There were so many pages which were my favorites. He was a fabulous writer, with a great sense of humor and a very pleasing style. Both young and old could read his works, understand them and enjoy them.
One of our family friends, who now resides in Michigan, was his secretary when he was finishing the last volumes. If you have any questions, I may be able to get the answers for you, or, if it's OK with her, help you get in touch.
You should be very proud of your uncle.