The book "Trees of the Northern United States: Their Study, Description and Identification" by the well-known author A. C. (Austin Craig) Apgar is a study of the trees that grow in the northern United States. The book describes in detail the features of each type of tree, their characteristics, places of growth and methods of identification. The author offers readers a unique opportunity to learn more about the diversity of North American forests and to recognize their main species with the help of this book. Thanks to bright illustrations and detailed descriptions, readers will be able to deepen their knowledge about the flora of this region.