S. O. S by Algernon Blackwood is offered here in a clean English digital edition prepared for fluent ebook reading. The work stands within horror and gives modern readers direct access to a public-domain classic with navigable structure and a restrained typographic presentation. The opening pages establish the book's atmosphere with this first movement: IT is a question how many witnesses shall be required to establish the veracity of an occurrence so singular, especially when one of such witnesses is a dog. Three of us, two men and a girl, had skimmed the snow-covered Jura slopes on our skees since noon, arriving toward four o'clock at the deserte This edition is suited to readers who want a reliable, uncluttered version of the text for study, rediscovery, and sustained reading.