The book "The Lost Purse; or, The Luck of Tom Mason" by the writer Harry Castlemon tells the story of a young boy Tom Mason, who becomes a participant in a series of exciting adventures. While walking in the park, Tom finds a wallet lost by a stranger. Giving the wallet to the owner, he has no idea what unforeseen circumstances it will force him to experience. Learning about honesty, courage and the flaws of human nature will help Tom to go through the difficult path to growing up and understanding the world. The author skillfully weaves into the plot valuable life lessons that remain relevant even in our time.