- MechWarrior 5 Mercenaries: Obligation's Forge (An Origins Series Story, #8)
- MechWarrior 5 Mercenaries: Origins (Installments 1-8)
- MechWarrior 5 Mercenaries: The Calm of the Void (An Origins Series Story, #1)
- MechWarrior 5 Mercenaries: Vision's Hunger (An Origins Series Story, #2)
- Med Ship Man
- Medal of Honor
- Medic
- Medical Investigation in Seventeenth Century England
- Medical Sci-Fi Short Stories
- Medicamentum
- Medicate (From the Desk of Col. Garrett Ross)
- Medusa in the Graveyard
- Medusa's Children
- Medusa's Coil
- Meet Me in the Future
- Meet Me in the Moon Room
- Meet Mr. G
- Meet n' Greet
- Meet The Unimaginables
- Meet theMultiples
- Meeting Infinity
- Meeting of the Board
- Meeting of the Minds
- Meg's Escape: Octant Chronicles #2
- MEG: A Novel of Deep Terror
- MEG: Generations
- MEG: Hell's Aquarium
- MEG: Nightstalkers
- MEG: Primal Waters
- Megabook of Military SF & Technothrillers
- Megabook of Military SF And Technothrillers
- Megafaunation
- MegaKiller Reloaded
- Megalodon
- Megalomachia
- Megan and Mary Paired By Fate
- Megan and Mary Play the Cosmic Game
- Megayear Future History
- Megkésett októberi karácsony
- Meikyuu: Labyrinth Kingdom, a Tactical Fantasy World Survival Guide, Vol. 1 (light novel)
- Mein Kater vom Mars - Her mit dem Stoff!
- Mein Kater vom Mars - Zur Hölle mit den Zigs!
- Meister Zacharius
- Melicity
- Melissa On The Far Side
- Mellonta Tauta
- Melodies of Creation
- Melody Ridge
- Melome
- Melt Down
- Member of the Banned
- Memento Mori
- Memento mori. Фантастические рассказы
- Mementoes
- Mementos and Memories
- Memoirs of a Dreamer
- Memoirs of a Mad Scientist One: Solarpunk Outlaw
- Memoirs of a Timelord
- Memoirs of Asylum: Janet Blair
- Memoirs of Sherlock Holmes
- Memorias de hielo (Malaz: El Libro de los Caídos 3)
- Memorias de un gran eclipse
- Memories and Magic, Anthology #2
- Memories From Reality
- Memories in a Bottle
- Memories of Angels
- Memories of Hel
- Memories of One
- Memories of Stars
- Memories of the Future
- Memories of the Gods
- Memories of Time Throne
- Memories Stirred
- Memorium
- Memory
- Memory 2.0
- Memory and Metaphor
- Memory Blank
- Memory Lane: and Other Tales of Cyberpunk Tomorrows
- Memory Machine Courtroom Killings
- Memory Machine: Birthday Killings
- Memory Seed
- Memory Song
- Memory Stick
- Memphis 3000
- Men and Beasts
- Men in Black International: The Official Movie Novelisation
- Men In Kilts With Tentacles and The Women Who Love Them - Book 2: Charlie
- Men Like Gods
- Men of War
- Men Without a World
- Menace from the Deep
- Men Without a World
- Menace from the Deep
- Menace of the Blond Fox
- MENACING OPPOSITION
- Mendiant 3458
- Mendoza in Hollywood
- Menelaus
- Menta-Life: Desertion
- Mentats of Dune
- Meraiah
- Merc: Retribution
- Mercenaries
- Mercenary
- Mercenary (Star Minds Lone Wolves)
- Mercenary Empress
- Mercenary Knights
- Merchantman (The Girls from Alcyone)
- Merchants and Maji
- Mercs!
- Mercury and Prometheans
- Mercury Eye: A Novella
- Mercury's Curse
- Mercy
- Mercy for Hire Mission Pack 1: Missions 1-4
- Mercy for Hire Mission Pack 2: Missions 5-8
- Mercy for Hire Mission Pack 3: Mission 9-12
- Mercy for Hire Mission Pack 4: Missions 13-16
- Mercy Kill
- Mercy Mission
- Mercy's Grace
- Mercys World
- Mere Child to a Ruthless Bow-Slayer
- Mergs (Or Why Godot Can't Come) (short story)
- Meridian
- Meridian's Shadow
- Meridiana: The Adventures of Three Englishmen and Three Russians in South Africa
- Merimnae
- Merimnae: Inbound
- Merimnae: Outbound
- Merker's Outpost
- Merlin's Fireball
- Merlin's Gate
- Merlin's Mirror
- Merlín. Los años perdidos
- Mermaid Spell