I was not on the summit of K2, as I mistakenly announced a few days ago. The admission by Austrian skyrunner Christian Stangl shook the international climbing community at the end of summer 2010. Fraud and deception, fake news and post-truth: those who think the world of alpinism is a pristine place in this regard are mistaken. Many times, doubts have arisen in public about whether climbers have lied or at least not told the whole truth regarding a sporting achievement. The new book by renowned Ticino journalist and mountain guide Mario Casella approaches this complex topic in a gripping manner with psychological sensitivity. Christian Stangl, Walter Bonatti, Maurice Herzog, Tomo Cesen, Reinhold Messner... The list of climbers who have lied at some point in their careers goes on.