After the international success of his first book "Running or Dying", Kilian Jornet has regained his pen and proposes " The Invisible Border". A book in which the Catalan prodigy clearly explains his passion for the mountains, his attraction to the summits and to the most senseless new challenges: ascent records of Mont-Blanc, the Matterhorn, etc. Through the sometimes poignant realization of his expeditions in the world's largest mountains, the Iberian athlete also achieves a reality;A true introspection into his personality, his need for solitude, the notion of risk and danger and his doubts linked to his devouring passion for the mountains. Jornet returns here to an astonishing style where he harmoniously fiction and reality, to express even better the complexity of his character. A strong, intense and emotional book, awaited by a large audience.