Tolkiens Books
The Hobbit

The Lord of the Rings
The Fellowship of the Ring
The Two Towers
The Return of the King

The Silmarillion
Unfinished Tales
The Adeventures of Tom Bombadil

The History of Middle Earth Series
The Book of Lost Tales, Part 1
The Book of Lost Tales, Part 2
The Lays of Beleriand
The Shaping of Middle-Earth: The Quenta, The Ambarkanta and the Annals
The Lost Road and Other Writings
The Return of the Shadow: The History of the Lord of the Rings, Part One
The Treason of Isengard: The History of the Lord of the Rings, Part Two
The War of the Ring: The History of the Lord of the Rings, Part Three
Sauron Defeated: The History of the Lord of the Rings, Part Four
Morgoth's Ring: The Later Silmarillion, Part One : The Legends of Aman
The War of the Jewels: The Later Silmarillion : Part Two : The Legends of Beleriand
The Peoples of Middle-Earth

Non-Middle Earth Books
Roverandom
Sir Gawain and the Green Knight, Pearl, Sir Orfeo
Smith of Wootton Major and Farmer Giles of Ham
Letters from Father Christmas
The Father Christmas Letters
Finn and Hengest
The Monsters and the Critics
Tree and Leaf

Other Books
The Tolkien Reader

Below is The Middle Earth Calendar