| Keith of the Border | Randall Parrish |
| Key to the Unknown, The | Rosa N. Carey |
| King Spruce | Holman Day |
| Knave of Diamonds, The | Ethel M. Dell |
| Lady and the Pirate, The | Emerson Hough |
| Lady Betty Across the Water | C. N. and A. M. Williamson |
| Land of Long Ago, The | Eliza Calvert Hall |
| Langford of the Three Bars | Kate and Virgil D. Boyles |
| Last Trail, The | Zane Grey |
| Last Voyage of the Donna Isabel, The | Randall Parrish |
| Leavenworth Case, The | Anna Katherine Green |
| Life Mask, The | Author of "To M. L. G." |
| Lighted Way, The | E. Phillips Oppenheim |
| Lin McLean | Owen Wister |
| Little Brown Jug at Kildare, The | Meredith Nicholson |
| Lonesome Land | B. M. Bower |
| Lord Loveland Discovers America | C. N. and A. M. Williamson |
| Lorimer of the Northwest | Harold Bindloss |
| Lorraine | Robert W. Chambers |
| Lost Ambassador, The | E. Phillips Oppenheim |
| Love Under Fire | Randall Parrish |
| Macaria (Illustrated Edition) | Augusta J. Evans |
| Maid at Arms, The | Robert W. Chambers |
| Maid of Old New York, A | Amelia E. Barr |
| Maids of Paradise, The | Robert W. Chambers |
| Maid of the Whispering Hills, The | Vingie E. Roe |
| Maid of the Forest, The | Randall Parrish |
| Making of Bobby Burnit, The | Geo. Randolph Chester |
| Mam' Linda | Will N. Harben |
| Marriage | H. G. Wells |
| Marriage a la Mode | Mrs. Humphrey Ward |
| Master Mummer, The | E. Phillips Oppenheim |
| Masters of the Wheatlands | Harold Bindloss |
| Max | Katherine Cecil Thurston |
| Mediator, The | Roy Norton |
| Memoirs of Sherlock Holmes | A. Conan Doyle |
| Missioner, The | E. Phillips Oppenheim |
| Miss Gibbie Gault | Kale Langley Bosher |