This book is a detailed account of a Venetian merchant's extensive travels throughout Asia during the 13th century. The narrative provides a comprehensive exploration of the diverse cultures, customs, landscapes, wildlife, and wealth of the Eastern world, including the Mongol Empire and China, where the author spent time in the court of Kublai Khan. His descriptions of the grandeur and sophistication of these civilizations challenged European assumptions about the East, and his tales of exotic wonders and adventures continue to captivate readers today.

"The Crystal Horizon" is a gripping account of the author's solo climb of Mount Everest without the aid of supplemental oxygen, a feat never accomplished before. The book not only details the physical and mental challenges faced during the climb but also delves into the philosophical and spiritual journey the author undergoes. The narrative is interspersed with reflections on the history and culture of the Himalayas, the nature of mountaineering, and the author's personal beliefs and motivations.