Tom Swift buys a diamond pin and learns from a suspicious jeweler that perfect stones are flooding the market from an unknown source. With the excitable Mr. Damon, the mysterious Mr. Jenks and his rival Andy Foger never far off, Tom sets out for the West in his airship to find Phantom Mountain, Black Gulch and the men who make diamonds.
Classic Stratemeyer Syndicate adventure from 1911, with all the gadgets and villains series fans expect. Download the free EPUB.