* _American Independence:the Great Upheaval_ (1938)
* _Mainspring:The Story of Human Progress_ (1941)
* _The Education of a Son:Woodrow Wilson and the Future of Democracy_ (1950)
* _Historien om den gamle mission:_ Mission San Carlos Borromeo de Carmelo (1952)
* _Drenge og piger fra kolonitiden_ (1954)
* _The Forgotten Diplomat:Herbert Hoover and the Far East_ (1963)
* _How It All Began:Origins of the Western World_ (1966)
* _Jeg møder dig på toppen_ (1968)