Books in Bestsellers, American, 1895-1923 (sorted alphabetically)
- Man for the Ages: A Story of the Builders of Democracy Irving Bacheller
- Man from Brodney's George Barr McCutcheon
- Man in Lower Ten Mary Roberts Rinehart
- Man of the Forest Zane Grey
- Manxman Sir Hall Caine
- Margaret Ogilvy J. M. Barrie
- Margot Asquith, an Autobiography - Two Volumes in One Margot Asquith
- Maria Chapdelaine: A Tale of the Lake St. John Country Louis Hémon
- Market-Place Harold Frederic
- Mark Twain: A Biography. Complete Albert Bigelow Paine
- Mark Twain: A Biography. Volume III, Part 1: 1900-1907 Albert Bigelow Paine
- Mark Twain: A Biography. Volume III, Part 2: 1907-1910 Albert Bigelow Paine
- Mark Twain: A Biography. Volume II, Part 1: 1886-1900 Albert Bigelow Paine
- Mark Twain: A Biography. Volume II, Part 2: 1886-1900 Albert Bigelow Paine
- Mark Twain: A Biography. Volume I, Part 1: 1835-1866 Albert Bigelow Paine
- Mark Twain: A Biography. Volume I, Part 2: 1866-1875 Albert Bigelow Paine
- Mark Twain's Letters — Complete (1853-1910) Mark Twain
- Mark Twain's Letters — Volume 1 (1853-1866) Mark Twain
- Mark Twain's Letters — Volume 2 (1867-1875) Mark Twain
- Mark Twain's Letters — Volume 3 (1876-1885) Mark Twain
- Mark Twain's Letters — Volume 4 (1886-1900) Mark Twain
- Mark Twain's Letters — Volume 5 (1901-1906) Mark Twain
- Mark Twain's Letters — Volume 6 (1907-1910) Mark Twain
- Marriage of William Ashe Mrs. Humphry Ward
- Mary Marie Eleanor H. Porter