- M Issue 4
- M. d’Outremort (et autres nouvelles fantastiques) [édition intégrale revue et mise à jour]
- M/F/P Circle One
- Machimagic: An Illustrated Short Story Collection
- Machine God
- Machine of Death
- Macrocosm
- MacSweeny's Maniacal Material Market: Short Stories of Employee Mayhem
- Mad Queen's Chess
- Mad Scientist Journal: Autumn 2012
- Mad Scientist Journal: Autumn 2013
- Mad Scientist Journal: Autumn 2014
- Mad Scientist Journal: Autumn 2015
- Mad Scientist Journal: Autumn 2016
- Mad Scientist Journal: Autumn 2017
- Mad Scientist Journal: Autumn 2018
- Mad Scientist Journal: Autumn 2019
- Mad Scientist Journal: Spring 2012
- Mad Scientist Journal: Spring 2013
- Mad Scientist Journal: Spring 2014
- Mad Scientist Journal: Spring 2016
- Mad Scientist Journal: Spring 2017
- Mad Scientist Journal: Spring 2018
- Mad Scientist Journal: Spring 2019
- Mad Scientist Journal: Summer 2012
- Mad Scientist Journal: Summer 2013
- Mad Scientist Journal: Summer 2014
- Mad Scientist Journal: Summer 2015
- Mad Scientist Journal: Summer 2016
- Mad Scientist Journal: Summer 2017
- Mad Scientist Journal: Summer 2018
- Mad Scientist Journal: Summer 2019
- Mad Scientist Journal: Winter 2013
- Mad Scientist Journal: Winter 2016
- Mad Scientist Journal: Winter 2017
- Mad Scientist Journal: Winter 2018
- Mad Scientist Journal: Winter 2019
- Mad Scientist Journal: Winter 2020
- Maddrax 456
- Maddrax 457
- Made to Order
- Made-to-Order
- Madness Under the Tracks
- Madre di sangue
- Magic & Mayhem Sampler
- Magic Among Us
- Magic and Machines
- Magic Highways: The Early Jack Vance, Volume Three
- Magical Meanderings
- Magnet Omnibus I
- Magnet: Marauder (Lacuna)
- Magnet: Scarecrow
- Magnet: Special Mission (Lacuna)
- Magnificent Devices Manor House Quartet
- Maiden Voyage of the Pink Plastic Ponies
- Mail Order Massacres
- Majesty Tanyája
- Major Science Fiction Anthologies: A Brief History
- Make Shift
- Maladapt
- Malfunction: The Awakening of Mila
- Malédiction
- Man Against the Future
- Man and Machine
- Man met een missie
- Man's Best Friend
- Man-Kzin Wars III
- Man-Kzin Wars IV
- Man-Kzin Wars Series V
- Man-Kzin Wars XIV
- Man-Kzin Wars XV
- Mandato di cattura
- Manhattan In Reverse
- Manhunt How Long Can You Run
- Manic Musings of a Maniacal Mind
- Manjac And The Nosebleed Section
- Manna from Heaven
- Manoscritto trovato in una macchina del tempo abbandonata
- Mantis
- Manuale di Metafisica elementare
- Many Little Deaths
- Manykomica
- Mapping the Silence of Dreams
- Maps in a Mirror
- Maps of Broken Places
- Maps of the Edge
- Marcel et Riton
- Marianne
- Marika
- Marion Zimmer Bradley's Darkover
- Marionette
- Marisa
- Marked For The Alien Prince - Trilogy
- Markers: Book 2
- Markus
- Mars
- Mars (Episode 1)
- Mars Conspiracy
- Mars Encounter: Prequel Stories
- Mars McCoy and the Curse of the Star Lance
- Mars or Bust: An Admonitory Fable
- Marte nostrum
- Martian Invaders Meet Mom
- Martian Super Pack
- Martian Terror and two more stories
- Martian Voices
- Martian Water
- Martin Takener - Abenteuer im All
- Marvin and the 50 Foot Couple
- Marvin and the 50 Foot Woman
- Masked Mosaic: Canadian Super Stories
- Masques of Darkover
- Master of Orion: To the Stars
- Master of the House
- Master Stargazer
- Master Zacharus
- Masterpieces
- Masters in This Hall
- Mastodons on Mars
- Matchmaker
- Mated
- Mated to the Alien Volume Two
- Materia grigia
- Matryoshka Infinities
- Mauvaises ondes
- Mayhem in the Air
- McGellen
- Me and Susannah
- Mean Universe
- Meant to Be Together
- Meanwhile in the Middle of Eternity
- Measure for a Loner
- MECH
- Mecha Origin
- Medical Sci-Fi Short Stories
- Medicamentum
- Medicate (From the Desk of Col. Garrett Ross)
- Medusa's Coil
- Meet Me in the Future
- Meet Me in the Moon Room
- Meet Mr. G
- Meet n' Greet
- Meeting Infinity
- Meeting of the Minds
- Megabook of Military SF & Technothrillers
- Megafaunation
- Megkésett októberi karácsony
- Meister Zacharius
- Mellonta Tauta
- Melodies of Creation
- Member of the Banned
- Memento Mori
- Mementoes
- Memories and Magic, Anthology #2
- Memories From Reality
- Memories in a Bottle
- Memories of Hel
- Memories of One
- Memories of Stars
- Memories of the Dead Man
- Memories of the Gods
- Memory