- Anthony Adverse (1933): A historical novel set during the Napoleonic era, following the life and adventures of Anthony Adverse, an illegitimate son of an English nobleman.
- The Forest and the Fort (1941): A historical novel set in the early days of the American Revolution, depicting the struggles and conflicts between the British and the American colonists.
- Israfel: The Life and Times of Edgar Allan Poe (1926): A biography of the American poet Edgar Allan Poe, offering insights into Poe's life, works, and literary contributions.
- Action at Aquila (1943): A novel set during World War II, following the exploits of an American medical unit stationed in the Italian city of Aquila.
- The City in the Dawn (1950): A historical novel set in the ancient world, exploring the rise and fall of the city of Troy and the Trojan War.
- Toward the Morning (1948): A collection of short stories delving into various themes, including war, love, and human relationships.
- New Letters of Abigail Adams (1956): An annotated edition of the letters written by Abigail Adams, wife of President John Adams, providing a glimpse into her personal life, thoughts, and observations.