The Silmarillion

…this “legendarium,” which eventually became The Silmarillion, partly to provide a setting in which “Elvish” languages he had invented could exist. But his tales of Arda and Middle-earth also grew from a desire to tell stories, influenced by a love of myths and legends. To entertain his four children, he…

…was succeeded by his posthumous The Silmarillion (1977). The Lord of the Rings is the saga of a group of sometimes reluctant heroes who set forth to save their world from consummate evil. Its many worlds and creatures were drawn from Tolkien’s extensive knowledge of philology and folklore.