Ficciones — Jorge Luis Borges (1944)

Ficciones — Jorge Luis Borges (1944) redefined what a short story could be: 17 pieces that double as philosophical essays, mathematical thought experiments, and metaphysical puzzles, each drilling into a single idea—an infinite library, a man with perfect memory, a map that exactly matches its territory—with the precision of a proof and the strangeness of a dream. Its influence is staggering: it invented postmodern fiction decades before the term existed and laid the groundwork for 80% of experimental writing that followed.