The book "Common Spiders of the United States" by the well-known author James Henry Emerton is an essential reference for anyone interested in arachnology and conservation. In this book, the author describes in detail the most common species of spiders found in the United States, providing information on their characteristics, habits, habitat, and environmental impact. The book includes illustrations that help identify these invertebrates and provide a better understanding of their role in the biodiversity of the United States. "Common Spiders of the United States" is not only a useful source of information for specialists, but also an interesting textbook for a wide range of readers who want to expand their knowledge of the world around them.