Religious and Spiritual:
* The River of Years: A Book of Meditations (1918): This is considered his most popular work, a collection of essays exploring life, death, and faith.
* The Eternal Quest: A Study in the Meaning of Life (1928)
* The Greatest Gift (1931): A short story about the true meaning of Christmas.
* The Wise and the Wayward (1938)
* The Altar Stairs (1940)
* The Unfinished Symphony: A Book of Sermons (1944)
* The Rainbow Bridge: A Book of Prayers (1949)
* My Quest for God: An Autobiography (1954)
Literary and Historical:
* The Builders: A Study in the Spirit of the American Constitution (1904)
* The Life of Abraham Lincoln (1906)
* The Right to Be Happy (1907)
* The Greatest Book in the World: A Study of the Bible (1916)
* The Old Man's Book (1929): A collection of essays for older people.
* The Story of the Bible (1933)
* The Spirit of the Common Man (1935)
* The Great Sermons of the World (1938): A collection of sermons by famous preachers throughout history.
* The Pilgrim Spirit: A Study of the American Mind (1941)
Other:
* He also wrote several books of poetry and short stories.
* He edited and contributed to numerous anthologies.
His work is characterized by:
* A deep understanding of both religion and literature: He explored themes of faith, spirituality, and human experience through his writing.
* A clear and compelling writing style: He was known for his eloquent prose and his ability to connect with his readers on a personal level.
* A focus on the common man: His writings often emphasized the importance of faith and hope for people from all walks of life.
Newton's work continues to be relevant and inspiring today. His books are a valuable resource for anyone seeking insights into the human condition, the meaning of life, and the power of faith.