"The Young Engineers in Colorado; Or, On Serious Railroad Construction" is an exciting adventure book written by the outstanding American author Harry Irving Hancock. In this book, the author tells about the incredible adventures of a group of young engineers who decided to join the construction of a railroad in the state of Colorado. They face the dangers and challenges associated with the construction of heavy and complex infrastructure, but thanks to their ingenuity, friendship and joint efforts, they overcome all obstacles. The book "The Young Engineers in Colorado; Or, On the serious construction of railways" is an exciting literary masterpiece that will captivate both younger and older readers. This is an exciting story of friendship, courage and resourcefulness that inspires readers to believe in themselves and their abilities."