Here is a breakdown of his major works:
Major Works:
* The Hobbit (1937)
* The Lord of the Rings (1954-1955): This is actually a trilogy, consisting of *The Fellowship of the Ring*, *The Two Towers*, and *The Return of the King*.
* The Adventures of Tom Bombadil (1962): A collection of poems and stories set in Middle-earth.
* The Silmarillion (1977): A collection of myths and legends that form the background of Middle-earth, edited and published after his death by his son Christopher Tolkien.
* Unfinished Tales of Númenor and Middle-earth (1980): Another collection of Tolkien's writings about Middle-earth, edited by his son Christopher.
* The History of Middle-earth (1983-1996): A 12-volume series of Tolkien's notes and writings about Middle-earth, compiled and edited by Christopher Tolkien.
Other Works:
* The Adventures of Tom Bombadil (1962)
* Farmer Giles of Ham (1949)
* Smith of Wootton Major (1967)
* Tree and Leaf (1964)
* The Fellowship of the Ring (1954): The first volume of The Lord of the Rings.
* The Two Towers (1954): The second volume of The Lord of the Rings.
* The Return of the King (1955): The third volume of The Lord of the Rings.
* The Book of Lost Tales (1983): Part of The History of Middle-earth series.
* The Lay of Leithian (1983): Part of The History of Middle-earth series.
* The Shaping of Middle-earth (1986): Part of The History of Middle-earth series.
* The Lost Road and Other Writings (1987): Part of The History of Middle-earth series.
* The Return of the Shadow (1988): Part of The History of Middle-earth series.
* The Treason of Isengard (1989): Part of The History of Middle-earth series.
* The War of the Ring (1990): Part of The History of Middle-earth series.
* Sauron Defeated (1992): Part of The History of Middle-earth series.
* Morgoth's Ring (1993): Part of The History of Middle-earth series.
* The Peoples of Middle-earth (1996): Part of The History of Middle-earth series.
These are some of the most notable works by J.R.R. Tolkien. He also wrote many essays, poems, and academic works.