Thank you very much for your nice letter, I was very pleased that you wrote to tell me you enjoyed The Hobbit and The Lord of the Rings. As for writing more about the same characters, I have written almost all there is to write about them. But I hope you will recognize some of the characters in another book I am busy writing, called The Silmarillion, which I hope will soon be finished.
Please give my best wishes to your family and sister, it sounds as if I have many friends amongst them.
Tolkien died ten years later with The Silmarillion still unfinished.