Biographies of three contemporaries who helped establish the United States as an independent nation: Benjamin Franklin, George Washington, and Thomas Jefferson.
Biographies of four people whose love of nature inspired them to superior achievements in their field: Rachel Carson, John Audubon, John Muir, and Luther Burbank.
Biographies of three men who achieved fame for their ability to entertain--one as a magician, one as a cowboy comedian and philosopher, and one as a producer of motion pictures and animated cartoons.