Yves Ballu, born in February 1943, is a French mountaineer, writer, and mountain historian who has established himself as one of the leading figures in contemporary mountaineering literature. A Doctor of Science and physicist by training, he pursued a career at the French Atomic Energy Commission (CEA), where he notably served as Director of Communications, while simultaneously developing a substantial body of literary work devoted to the history of mountaineering and mountain culture. As a mountaineer, he has climbed numerous classic routes in the Alps and participated in expeditions, field experience that informs his narratives and historical research. His passion for the mountains was quickly complemented by scholarly work: over the decades, Yves Ballu has amassed a vast collection of documents—books, journals, archives, and photographs—which today constitutes a key resource on the history of mountaineering. It is from this material that he draws inspiration for his books, which intertwine the lives of great climbers, accounts of ascents, high-altitude tragedies, and the evolution of practices, from skiing to Himalayan expeditions. This dual perspective—that of a scientist accustomed to rigorous research and that of a passionate practitioner—gives his work a unique tone, blending documentary precision with a flair for storytelling. Yves Ballu served as a "mountain advisor" at the Ministry of Youth and Sports in the early 1980s, contributing to public policies related to mountaineering and mountain sports. Author of more than twenty, or even thirty books depending on the source, he has written biographies, historical essays, and novels, becoming one of the leading authors of French-language mountain literature. He is notably the author of works on Gaston Rébuffat – including "Gaston Rébuffat, a Life for the Mountains" – as well as comprehensive books such as "The Mountaineers" and "Mont Blanc, Temple of Mountaineering," which trace the evolution of high-altitude mountaineering practices and perceptions. He also explored the novel form with, among others, "Dying in Chamonix," "The Conspiracy of Namche Barwa," and "The Possibility of Emptiness," where thriller and fiction are grounded in an intimate knowledge of major expeditions and Alpine tragedies. Among his most notable works is also "Shipwreck on Mont Blanc," a detailed investigation into the Vincendon and Henry affair, a tragedy that occurred in winter in the Mont Blanc massif, of which he published an illustrated version in the Guérin collection. His books have been recognized with numerous specialized awards, notably the Louis-Castex Prize from the French Academy and several prizes for beautiful mountain books, which acknowledge both the quality of his research and the power of his writing. Even today, his work, his archives, and his public appearances continue to inform discussions about the place of mountains in French culture, encompassing the heroic legacy of pioneers, questions about risk, and a critical examination of the myths surrounding great ascents.