On a rainy afternoon in 1994, Elias Martell—an unassuming bookseller with a crooked smile—found a battered box tucked behind crates of remaindered atlases in the basement of his shop. Inside, wrapped in brittle tissue, lay a slim hardbound book stamped, in faded gold, “Encyclopaedia of Chess Openings — Volume B.” Its spine creaked like an old ship as Elias opened it and saw the faint pencil annotations in the margins—miniatures of positions, arrival times, and single words in four languages.