|
| — M — |
| Amin Maalouf | K. W. MacAnn | Bonnie MacBird | Gary D. MacClellan | John D MacDonald |
| Antonio Machado | Norman L. Macht | Enrique Machuca | Sergio Macías García | R. W. Mackelworth |
| Edward Mackin | Sarah MacLean | Frank MacShane | Tom Maddox | Elliot S! Maggin |
| Elisabeth Malartre | Massimiliano Malerba | George Malko | César Mallorquí | Roberto Malo |
| Thomas Malory | Barry N. Malzberg | David Mancera | Paco Mancera | Avro Manhattan |
| Laurence Manning | Marcos Manrique | Julio O. Manzo | José Ángel Mañas | Laura S. Maquilón |
| Santiago Marchese Flórez | Óscar de Marcos Escriña | Marco Antonio Marcos Fernández | Daniel Mares | Fernando Marías |
| Rafael Marín | Gloria Mark | Winston K. Marks | Louise Marley | Carlos Francisco Márquez Linares |
| Sergio Mars | Blanca Mart | Bertil Martensson | María Antonia Martí Escayol | Félix Martí Ibáñez |
| Carlos Martí Mezquita | George R. R. Martin | Miguel Martín Cruz | Javier Martín Lalanda | Luis Martín Santos |
| Santiago Martín Subirats | A. V. Martinet | Abel Martínez | Blanca Martínez | Elviro Martínez |
| F. J. Martínez | Felicidad Martínez | Layla Martínez | Rodolfo Martínez | Sebastián Martínez |
| Ismael Martínez Biurrun | Carlos M. Martínez Bouquet | Carlos Martínez Córdoba | Ignacio Martínez de Pisón | Cristina Martínez García |
| José Martínez Moreno | Sergio Martínez Mourelle | Javier Martos | Groucho Marx | Luca Masali |
| John Masefield | David Mateo | Alfonso Mateo-Sagasta | Carlos Mateos López | Miguel Matesanz |
| Richard Matheson | David Matusek | Karl May | Iván Mayayo | Bruce McAllister |
| Paul J. McAuley | Sally McBride | Anne McCaffrey | Roy L. McCardell | Cormac McCarthy |
| Jack McDevitt | Anson McDonald | Ian McDonald | Ian McDowell | J. T. McIntosh |
| Will McIntosh | Vonda McIntyre | Dave McKean | Suzy McKee Charmas | Patricia A. McKillip |
| Dean McLaughlin | Alistair McLean | Ángel Medina | S. P. Meek | Ib Melchior |
| Paul Melko | Felipe Mellizo | Herman Melville | David Mendaña | Magín Méndez Sanguos |
| Plinio Apuleyo Mendoza | José Ángel Menéndez Lucas | Arturo Mengotti | Guera Mengotti | A. J. Merak |
| José María Merino | Judith Merril | Abraham Merrit | Carlos Mesa | J. G. Mesa |
| Nicholas Meyer | Gustav Meyrink | Melisa Michaels | Gilbert Michel | James A. Michener |
| Alejandro Mier | China Mieville | Hernán Migoya | John Milius | P. Schuyler Miller |
| Walter M. Miller Jr. | John Milton | Teresa P. Mira de Echeverría | Alberto Miralles | Iván Miras |
| Javier Miró | Margaret Mitchell | Laura J. Mixon | Manuel Miyares | Judith Moffet |
| Moisés | Manuel Moledo | Iván Molina Jiménez | Alfons Moliné | H. W. Mommers |
| Pedro Monje | Indro Montanelli | Amparo Montejano | Javier Montellano | José María Montells |
| Rosa Montero | Manuel Montes | Raúl Montes de Oca | Ricardo Montesinos | Ricardo Montesinos Valentín |
| Sandra Monteverde Ghuisolfi | Enrique Montiel de Arnaíz | Michael Moorcock | Catherine L. Moore | Raylyn Moore |
| Víctor Mora | Didac Morales | Carla C. Moreno | Carmen Moreno | Fernando Ángel Moreno |
| Joaquín Moreno | Manuel Moreno Bellosillo | Sergio Moreno Montes | Silvia Moreno-García | Chris Morgan |
| Richard Morgan | Nieves Mories | Grant Morrison | James Morrow | William Chambers Morrow |
| Pedro Antonio Moscatel Gómez | Sam Moskowitz | Erick J. Mota | Magdalena Moujan Otaño | Dennis Mourdoch |
| Manuel Moyano | Slawomir Mrozek | H. Warner Munn | Jorge Munnshe | Miguel Ángel Muñoz |
| Óscar Muñoz | Ramón Muñoz | Óscar Muñoz Caneiro | Julián Muñoz Carrasco | Vicente Muñoz Puelles |
| Juan Jacinto Muñoz Rengel | Pedro Muñoz Seca | Rafael Muñoz Vega | José Luis Muñoz Villar | Pat Murphy |
| William Murray |
