“An Iron Will” is a 1901 self-help book by American writer Orison Swett Marden that explores the subject of will-power and its importance to attaining a happy and successful life. It looks at the power of individual desire with reference to notable historical figures, offering the reader tips on how will-power can be concentrated and fostered in order to become a better, well-rounded, and altogether more powerful person. Dr. Orison Swett Marden (1848–1924) was an American author of inspirational books. He wrote primarily on the subject of being successful and founded “SUCCESS” magazine in 1897. Marden’s books deal with attaining a fruitful and well-rounded life, with many of his ideas being based on the New Thought movement. Contents include: “Training the Will”, “Mental Discipline”, “Doing Things Once”, “Centralizing Force”, Learning to Swim”, “Dr. Cuyler”, “The Big Trees”, “’I Will’”, “The Ruler of Destiny”, “’The Wills, The Won’ts, and the Can’ts’”, “A Tailor’s Needle”, etc. Many vintage books such as this are becoming increasingly scarce and expensive. It is with this in mind that we are republishing this volume now in an affordable, modern, high-quality edition complete with an introductory essay on self-help by Russel H. Conwell.