The Adventures of Huckleberry Finn
Hemingway said all modern American literature comes from this one book, and the claim has held up. Twain handed the novel over to a poor, unschooled boy's voice and let the American vernacular carry the whole thing, dialect and all, which no serious writer had dared before 1884. Underneath the river idyll runs a furious account of slavery and the lies a society tells itself, climaxing when Huck decides he'd rather go to hell than betray a friend. It has been banned, taught, and argued over ever since, and the arguments are the point.
The last stretch, once Tom Sawyer takes over the business of freeing Jim, is where readers say the book collapses: elaborate, cruel, and a regression for everyone including Huck, who goes quiet and lets it run. Hemingway’s verdict that “the rest is cheating” still gets quoted as shorthand for it, and one reader says “someone just pricked the balloon.” Tom is “the most irritating character” long before that. The slur is a separate barrier, with a reader counting that “the N word was repeated more than 200 times.” The con men outstay their welcome, and the “hill billy like language” stalls anyone who never adjusts.
The case for it and the rest of the canon open with Pro.
