J. R. R. Tolkien members of the informal literary discussion group known as the Inklings. Tolkien was appointed a Commander of the Order of the British Empire by Queen Elizabeth II on 28 March 1972. After Tolkien's death, his son Christopher published a series of works based on his father's extensive notes and unpublished manuscripts, including "The Silmarillion". These, together with "The Hobbit" and "The Lord of the Rings", form a connected body of tales, poems, fictional histories, invented languages, and literary essays about a fantasy world called Arda and Middle-earth within it. Between 1951 and 1955, Tolkien applied the term "legendarium" to the
Christopher Tolkien "Beren and Lúthien " is an editorial work and was published as a stand-alone book in 2017. The next year, "The Fall of Gondolin " was published also as an editorial work. The Children of Húrin, Beren and Lúthien, and The Fall of Gondolin make up the three "Great Tales" of the Elder Days which J.R.R. Tolkien considered to be the biggest stories of the First Age. HarperCollins published other J. R. R. Tolkien work edited by Christopher Tolkien which is not connected to the Middle-earth legendarium. "The Legend of Sigurd and Gudrún" appeared in May 2009, a verse retelling