The Riddle of the Rajah's Ruby is an adventure from one of Enid Blyton's adventure series, likely the Young Adventurers. The plot revolves around a highly valuable, historical gem—the Rajah's Ruby—which has either been stolen or its whereabouts are hidden by a complex riddle. The young protagonists embark on a treasure hunt, using clues and historical knowledge to track down the jewel, often dealing with villainous adults who are also seeking the prize.
