The Prelude
The first great autobiographical poem in English. Wordsworth's account of the "growth of a poet's mind" traces his childhood in the Lake District, his experiences in revolutionary France, and the way specific memories ("spots of time") shape and sustain the imagination. It invented the idea that a poet's inner life is inherently interesting, and that the development of consciousness is worthy of epic treatment.
The Prelude was never finished or published in Wordsworth's life, meant only as a doorway into a much larger poem, The Recluse, that never got written. Readers feel that unresolved status: repeated false starts near the opening, where he catches himself and resets his thread, read by some as proof he never had a clear plan, and one reviewer says flatly “there simply was no really clear central focus.” The pastoral vision itself draws skepticism, nature rendered as “a land of lambs without lions, of butterflies without wasps,” no drought or hunger allowed in. Length compounds the problem: one reader needed nearly half a year to finish and says of the slower stretches it's “quite okay to put it aside.”
The case for it and the rest of the canon open with Pro.
