The book includes early stories and stories of the famous Russian writer Ivan Efremov, devoted to the mysteries of the past of our planet, its future, mysterious phenomena of nature, and Man - its most amazing creation. CONTENTS: Foreword by L. Soboleva . Meeting over Tuscarora (story), The Secret of Hell , Mountain Spirits Lake (story), The Sunrise (Stories) , Diamond Pipe (story), Yurt Crow (story), By the way of the old miners (story) , White Horn (story), Nur-i-Desht Observatory (story) , Olgoi-Khorkhoy (story) , The Shadow of the Past , Rainbow Jets Bay (story)"Katty Sark" (story), The Last Marcel (story) , Five Pictures (story) , Ataneor , Daughter of Aharhellen (story) , The Heart of the Serpent , Illustrations : A. Itkin