The Great Agnostic: Robert Ingersoll and American Freethought

Susan Jacoby's Freethinkers: A History of American Secularism was more comprehensive than this examination is as biography. It provides some biographical information (basically all supportive) but mostly is a summary of his ideas, which go beyond secularism to anti-vivisection, women's rights and support of the arts. Makes me to want to know more. Jacoby is most impressed by his ability to promote his ideas to the masses. An important matter -- many think, fewer are able to promote and make others think.