Prufrock and Other Observations (1917) contains my all-time favorite poem "The Love Song of J. Alfred Prufrock," a demoralizing story of one man's impotence in the face of rejection.

Poems (1920) contains the classics "Gerontion" and "Sweeney among the Nightingales."

The Sacred Wood(1920) is Eliot's criticism of poetry (criticism in the analytical meaning of the word) and contains the brilliant essay "Tradition and the Individual Talent."

The Waste Land (1922) is Eliot's masterpiece of the the world without rebirth.