There are by this time many collections of the works of Yeats, and this is one of the good ones. Aside from containing the major plays and poems it has critical essays by contemporaries of Yeats and important critical voices of our own time, such as Helen Vendler, Harold Bloom, and the poet Seamus Heaney.
As for the work itself, however historically important the plays, and however of curiosity value 'The Autobiography' and other prose writings the Yeats that lives is in the poetry.
It is that lyrical greatness the power of song manifested early on which later was deepened into even greater poetry. From 'Innisfee' and "Song of the Wandering Aengus ' to the poetry of 'Byzantium' and 'Among the Schoolchildren'.
The great lines, a small sample of which follows"
And we will wander hand in hand / through hollow lands and hily lands/
And pluck till time and times are done/ The silver apples of the moon/ The golden apples of the sun/
"We must lie down where all the ladders start/ in the foul rag and bone shop of the heart."
" The best lack all conviction, and the worst are full of passionate intensity"
"But one man loved the pilgrim soul in you/ and loved the sorrows of your changing face."