Start with North and South. It is the novel where both halves of Gaskell work at once: a Manchester mill town seen clearly enough to have annoyed mill owners, and a courtship plot with the best-argued misunderstandings in Victorian fiction. Margaret Hale and John Thornton are also simply good company, which matters more than critics admit when you are deciding whether to read five more books by someone.
The obvious alternative is Cranford, which is shorter, funnier, and the one people mean when they call Gaskell charming. That is exactly the problem. Cranford is a set of linked sketches about genteel poverty in a village of elderly women, and if you meet her there first you will file her as a minor comic writer and never find out she wrote about strikes, unmarried mothers and press gangs.
The social-problem novels
Mary Barton was her first, written after the death of her son, and it is the rawest thing she produced: Manchester in the hungry 1840s, told with a sympathy for working people that got her accused of stirring up class hatred. It is less well made than North and South and more upsetting.
Ruth: A Novel took the subject nobody would touch — a seduced and abandoned young woman raising her child — and refused to punish her in the way readers expected. Copies were burned. It is didactic in places and the ending is a compromise she may not have wanted, but it is a brave book.
Sylvia's Lovers is the most underrated: a whaling town on the Yorkshire coast during the Napoleonic wars, the Royal Navy press gang taking men off the street, and a marriage built on a lie. Older public-domain reprints of it circulate under padded listing titles, so check you are buying a properly edited modern edition rather than a scanned reprint.
The Cranford world and the shorter fiction
Now read Cranford, and it will land as what it is — a precise, unsentimental comedy about women managing on very little money — rather than as the whole of her.
Cousin Phillis is a novella and is arguably the most perfect thing she wrote: a railway engineer, a farm, a girl, and a heartbreak conveyed almost entirely by what is not said. The Moorland Cottage and My Lady Ludlow are minor but pleasant, and Gothic Tales collects the ghost stories, which are genuinely frightening and nothing like the rest of her output.
The two late books
Wives and daughters is her best novel and the one to finish on. Molly Gibson, a stepmother who is a masterpiece of self-deception rather than villainy, and a small town rendered with more patience than any of the earlier books had time for. One honest warning: Gaskell died before writing the final chapter. Every edition ends with a note from her editor explaining how it was to finish, so nothing is left in doubt, but the last page is not hers.
The Life of Charlotte Bronte is the other landmark — the first major biography of a novelist by a novelist, written from personal friendship and access to the letters. It is also legally notorious: passages were withdrawn from later printings after threats of libel action over its account of Branwell Bronte and the family's circumstances. Modern editions discuss what was cut and why. Read it as a shaping document of the Bronte legend, not as neutral evidence about it.
Six novels, a great biography and a handful of novellas is the whole career, and it is finishable. If you read three, read North and South, Cousin Phillis and Wives and daughters. More Victorian sequences are on the Gaskell hub.
Follow the full ordered path here: Elizabeth Gaskell in Order: Which Novel to Read First.