"Edge of the Earth" is a book that explores the history of geographical discovery, starting from the earliest known maps and voyages of exploration to the most recent advancements in space exploration. The book covers the contributions of explorers and cartographers such as Marco Polo, Christopher Columbus, Vasco da Gama, and James Cook, as well as the technological advancements that allowed for better navigation and mapping. The book is divided into chapters that cover different regions of the world and the discoveries made by explorers in each region. The book also discusses the impact of geographical discoveries on the world, including the development of trade and commerce, the spread of religion and culture, and the colonization of new lands. "Edge of the Earth" is a comprehensive and engaging account of the history of geographical exploration, making it an ideal read for anyone interested in the history of cartography, navigation, and exploration.