J. R. R. Tolkien
The request for a sequel prompted Tolkien to begin what would become his most famous work: the epic novel "The Lord of the Rings" (originally published in three volumes 1954–1955). Tolkien spent more than ten years writing the primary narrative and appendices for "The Lord of the Rings", during which time he received the constant support of the Inklings, in particular his closest friend C. S. Lewis, the author of "The Chronicles of Narnia". Both "The Hobbit" and "The Lord of the Rings" are set against the background of "The Silmarillion", but in a time long after it.
Lúthien
Lúthien Tinúviel (Y.T. 1200–Y.S. 503; died aged 3377) is a fictional character in the fantasy-world Middle-earth of the English author J. R. R. Tolkien. She is an elf, daughter of Thingol and Melian. She appears in "The Silmarillion", the epic poem "The Lay of Leithian", the Grey Annals section of "The War of the Jewels", and in other texts in Tolkien's legendarium. Her story is told to Frodo by Aragorn in "The Lord of the Rings".