Pudd'nhead Wilson

Roxana, enslaved and, by the era's one-drop accounting, one-sixteenth Black though indistinguishable in appearance from any white resident of Dawson's Landing, switches her infant son with her master's baby in their shared cradle, reasoning that raising her own child as the white heir is the only real protection she can give him. Twain sets the swap up almost as a fable's premise and then refuses to let it resolve like one: neither boy, the one raised as Tom Driscoll nor the one raised enslaved as Chambers, is improved or ennobled by the accident of which nursery he happened to grow up in.

Tom grows into a cruel, gambling-ruined young man who eventually murders his own uncle, Judge Driscoll, and Twain uses him to make a blunt argument: slavery's racial hierarchy is manufactured entirely by upbringing and social position rather than blood, since the boy the town calls white behaves worse than any of the enslaved men it condescends to. Meanwhile David Wilson, a lawyer the town nicknamed Pudd'nhead decades earlier over one misunderstood joke, has spent twenty quiet years as the local eccentric, cataloguing fingerprints as a hobby nobody else takes seriously.

Each chapter opens with a bitter epigraph attributed to Pudd'nhead Wilson's own private calendar of aphorisms, one-line jokes about human folly that comment obliquely on the action to come, and much of the novel's harshest irony lives in these fragments rather than in the plot itself, a running commentary from the one character sharp enough to see everyone else clearly and detached enough not to say so directly. Twain wrote the calendar entries as a separate, ongoing joke before the novel's plot was even settled, and the finished book keeps that separateness visible, Wilson's private wit running alongside a town too provincial to have ever taken him seriously.