The book "Trees worth knowing" by the author Donald Culross Pitty is a very interesting and informative reference for anyone interested in plants. In this book, the author describes various types of trees, talks about their botany, ecology and human use. Readers will be able to learn about the most common trees in North America, their history, characteristics and interaction with the surrounding environment. The book contains many illustrations that help to better understand the described types of trees. "Trees worth knowing" is an important and useful book for everyone who is interested in the plant world and seeks to expand their knowledge of the surrounding nature.