All works by W. B. Yeats, although briefly out of copyright in the 1990s, re-entered copyright since then and can only be published by permission of the publishers or the poet's estate.
For a brief biography of the poet, see the Nobel Foundation Web site and
Foster, R. F. "Yeats, William Butler (1865–1939)."Oxford Dictionary of National Biography. Ed. H. C. G. Matthew and Brian Harrison. Oxford: OUP, 2004. Online ed. Ed. Lawrence Goldman. Jan. 2011.
Yeats, W. B. Fairy and Folk Tales of the Irish Peasantry. 1888. [prose]
--. The Wanderings of Oisin and other Poems. 1889.
--. The Countess Cathleen. 1892. [play]
--. The Celtic Twilight. 1893. [prose]
--. The Land of Heart's Desire. 1894.
--. The Secret Rose. 1897. [prose]
--. The Wind among the Reeds. 1899.
--. The Shadowy Waters. 1900.
--. Cathleen ni Houlihan. 1902. [play]
--. In the Seven Woods. 1903.
--. On Baile's Strand. 1904. [play]
--. Deirdre. 1907. [play]
--. The Green Helmet and Other Poems. 1910.
--. Poems Written in Discouragement. 1913.
--. Responsibilities: Poems and a Play. 1914.
--. The Wild Swans at Coole. 1917.
--. A Vision. 1925. [prose]
--. Michael Robartes and the Dancer. 1921.
--. Seven Poems and a Fragment. 1922.
--. The Cat and the Moon and Certain Poems. 1924.
--. October Blast. 1927.
--. The Tower. 1928.
--. The Winding Stair. 1929.
--. Words for Music Perhaps and Other Poems. 1932.