"Peru in the Guano Age" is a book written by Alexander James Duffield. This book provides a historical account of Peru during the so-called "Guano Age," a period in the mid-19th century when Peru's economy was heavily dependent on the export of guano, a valuable fertilizer made from seabird excrement found on the country's coastal islands. During this era, guano became a valuable commodity in international trade, and Peru's economy experienced a boom...