Volumes 6-9 of The History of Middle-earth are sometimes published as The History of The Lord of the Rings, as these are the volumes that cover the development of TLotR. When they are published thusly, part of book 9 (Sauron Defeated) is published as a slimmer volume titled The End of the Third Age, omitting parts 2 and 3 of Sauron Defeated which d…