Christopher Tolkien's twelve-volume study of how his father's legendarium took shape, published between 1983 and 1996. Drawing on the papers J. R. R. Tolkien left at his death, it presents the earliest versions of the tales that became The Silmarillion - from The Book of Lost Tales, begun during the First World War, through the long poems of The Lays of Beleriand and the drafts of The Lord of the Rings, to the late writings on the Elves and the peoples of Middle-earth. Each volume sets the texts beside Christopher Tolkien's commentary, tracing how names, stories and whole mythologies changed over sixty years of rewriting. For dedicated readers rather than newcomers.