Start with Prufrock and Other Observations. It is thin — a first collection, a dozen poems — and the title poem does everything the later work does at a scale a reader can hold: the fractured interior monologue, the sudden drop into the ridiculous, the refusal to resolve. Read it and you have the ear you need for everything after.
The obvious start is The Waste Land, and it defeats most people who try it cold. Not because it is difficult in the ordinary sense but because it is difficult in an unfamiliar way: it does not have a speaker, a setting or an argument you can hold onto, and the notes Eliot attached are partly a joke at the reader's expense. It reads completely differently once you already know what his voice sounds like when it is doing something simpler.
The poems, in publication order
Publication order is the right order for Eliot, and this is one case where it is not even contested — the whole interest of the career is the trajectory, and reading out of sequence flattens it.
After Prufrock and Other Observations comes The Waste Land, the 1922 poem that reorganised English-language poetry around itself. Ezra Pound cut it roughly in half before publication, and knowing that changes how you read the joins.
Ash-Wednesday is the hinge. Eliot was received into the Church of England in 1927, and this is the first major poem written from the other side of that. Readers who came for the despair often find it a letdown; readers who stay with it usually end up thinking it is the more interesting problem.
Four quartets is the summit and the place to stop if you are stopping. Four long meditative poems written over roughly a decade, and the only work of his that rewards being read aloud from beginning to end in one sitting.
Old Possum's Book of Practical Cats sits outside all of this — light verse written for his godchildren, and the source of the musical. It is genuinely charming and tells you nothing about the rest.
The plays, honestly ranked
Murder in the Cathedral is the one worth reading: a verse drama about the killing of Thomas Becket, written for a cathedral festival, and the only play where the verse and the stage requirements pull in the same direction.
The family reunion and The cocktail party are Eliot trying to smuggle verse into drawing-room comedy. The cocktail party was a genuine commercial hit in its day and is now rarely revived; most readers find both have aged much harder than the poems. Read them if you want the whole career, skip them without guilt otherwise.
The criticism, which mattered as much as the poems
The sacred wood is where the arguments that shaped a century of English departments first appear, including the case for impersonality in poetry. Selected essays, 1917-1932 is the fuller collection and the one to own if you only own one. On poetry and poets is the late, mellower Eliot, several decades on, sometimes revising his own earlier verdicts.
The one volume to approach with warning
Inventions of the March Hare is the early notebook, published long after his death and heavily annotated. It contains juvenilia, drafts, and a run of obscene and racist comic verse that Eliot never intended to publish. It is a scholarly document, not a reading experience, and readers should decide deliberately rather than stumble into it.
That material is also part of a genuine and unresolved argument about the antisemitism in some of the published poems, and about how much it should weigh in reading the rest. Serious critics land in different places on it. It is not a question this guide can settle for you, but it is one you should know is open.
The full ordered sequence, poems first and criticism after, is on the path below.
Follow the full ordered path here: T.S. Eliot Reading Order: Where to Start with the Poems.