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 After Tolkien's death, his son Christopher published a series of works based on his father's extensive notes and unpublished manuscripts, including "The Silmarillion".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
J. R. R. Tolkien illustrated manuscript, with a typeset transcription on each facing page. More recently, in 2007, "The Children of Húrin" was published by HarperCollins (in the UK and Canada) and Houghton Mifflin (in the US). The novel tells the story of Túrin Turambar and his sister Nienor, children of Húrin Thalion. The material was compiled by Christopher Tolkien from "The Silmarillion", "Unfinished Tales", "The History of Middle-earth", and unpublished manuscripts. "The Legend of Sigurd and Gudrún", which was released worldwide on 5 May 2009 by HarperCollins and Houghton Mifflin Harcourt, retells the legend of Sigurd and the fall of the Niflungs from