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Nathan Miller. Theodore Roosevelt: A Life. 1992.

Edmund Morris. The Rise of Theodore Roosevelt. 1979.

Patricia O’Toole. When Trumpets Call: Theodore Roosevelt After the White House. 2005.

Henry Pringle. Theodore Roosevelt. 1931.

Carleton Putnam. Theodore Roosevelt: The Formative Years, 1858-1886.

Edward Wagenknecht. The Seven Worlds of Theodore Roosevelt. 1958.

Owen Wister. Roosevelt: The Story of a Friendship. 1930.