The Silmarillion is a collection of J. R. R. Tolkien 's mythopoeic works, edited and published posthumously by his son Christopher Tolkien in 1977, with assistance from Guy Gavriel Kay, who later became a noted fantasy writer.
The Silmarillion is a book written by J. R. R. Tolkien. It was first published posthumously in 1977, edited by his son Christopher Tolkien.