Lost Horizon (1933) by James Hilton is a utopian novel that introduces the mystical, hidden valley of Shangri-La in the Tibetan mountains—a place of peace, longevity, and harmony. The story follows Hugh Conway, a British diplomat kidnapped during a political upheaval in India, who, along with others, is taken to Shangri-La. There, Conway discovers a serene society governed by moderation and protected from the outside world, where inhabitants enjoy extended lifespans. The novel explores themes of refuge from the chaos of the modern world, the East as a source of wisdom, and the tension between ambition and tranquility. Shangri-La’s lasting cultural impact includes inspiring the popular use of the name for idyllic paradises. The book blends adventure and philosophical reflection on war, imperialism, and human desires.