Various 
Routledge Library Editions: W. B. Yeats 

This set reissues 6 books, originally published between 1951 and 1990, on William Butler Yeats, a foremost figure of twentieth-century literature and one of the driving forces behind the Irish Literary Revival. The volumes examine Yeats’s work, his poetic development, and his social and private life, and will be of interest to students of literature.