- Megalithic Science, Architecture and Astronomy in the Ancient World (Ancient Civilizations and Mysteries)
- Megalithic Science, Architecture and Astronomy in the Ancient World (Ancient Civilizations and Mysteries)
- Empire of the Ocean: The Lost Maritime Civilization of the Pacific (Ancient Civilizations and Mysteries)
- Skywatchers of Prehistory, the Hidden Origins of Ancient Shamanic Astronomy (Ancient Civilizations and Mysteries)
- Beneath the Sands: The Lost Worlds of Earth's Forgotten Deserts (Ancient Civilizations and Mysteries)














