"This Country of Ours" is a historical children's book authored by H. E. Marshall and first published in 1917. The book offers an accessible overview of American history, covering topics such as Christopher Columbus's discovery of America, early exploration and colonization, the American Revolution, the formation of the United States, and significant events and figures in the nation's history. Written in a narrative style, the book aims to make history engaging and informative for young readers. It has been used as a textbook in schools and remains a popular resource for children interested in American history.