"Letters of Asa Gray; Volume 1" is a collection of letters of the outstanding American botanist and vegetation researcher Asa Gray. In this book, the author shares his observations, impressions and information with his colleagues by sending them letters written from different parts of the world. It is a valuable source for studying the development of botany and scientific research in the 19th century. Sitting in his thoughts, Gray opens the wonderful world of plants and nature to the reader, emphasizing the importance of preserving the environment and studying biodiversity.