With a foreword by Jon G. Murray, former president of American Atheists Inc., the book is an eloquent summary of the lives of the "Great Infidels" of western history. Written by the "Great Infidel" orator of the 19th century Robert G. Ingersoll, the book discusses the origin of God and Heaven, the Devil and Hell, sacred books, the "appeal to the cemetery" as an argumentational ploy, and the role of fear in religion. It epitomizes the lives of Julian, Bruno, Voltaire, Diderot, Hume, Spinoza, Thomas Paine, and others.