- Maske: Thaery
- Masked Mosaic: Canadian Super Stories
- Masks & Mysteries #1
- Masks & Mysteries #10
- Masks & Mysteries #11
- Masks & Mysteries #2
- Masks & Mysteries #3
- Masks & Mysteries #4
- Masks & Mysteries #5
- Masks & Mysteries #6
- Masks & Mysteries #7
- Masks & Mysteries #8
- Masks & Mysteries #9
- Masks of Scorpio [Dray Prescot #31]
- Masks of the Illuminati
- Mason
- Masquerade
- Masques of Darkover
- Mass Effect - Andromeda: Nexus Uprising
- Mass Effect Andromeda: Nexus Początek
- Mass Effect: Annihilation
- Mass Effect: Ascension
- Mass Effect: Deception
- Mass Effect: Initiation
- Mass Effect: Retribution
- Mass Effect: Revelation
- Mass Effect: The Complete Novels 4-Book Bundle
- Master & Apprentice (Star Wars)
- Master Minds
- Master of Fate
- Master of None
- Master of Orion: To the Stars
- Master of Space and Time
- Master of Spacetime
- Master of the Asteroid
- Master of the House
- Master of the Moondog
- Master of the Revels
- Master of the World
- MASTER PLAN
- Master Stargazer
- Master Walk
- Master Zacharus
- Mastered by Her Mates
- Masterpieces
- Masters in This Hall
- Masters of Space
- Masters of Space
- Masters of the Vortex (Illustrated)
- Mastodons on Mars
- Matched and Mated
- Matchmaker
- Mate in Two Moves
- Mated
- Mated on the Moon
- Mated to the Alien Volume Four
- Mated to the Alien Volume Two
- Mated To The Cyborgs
- Materia grigia
- Materia non vitale
- Mathias Sandorf – suivi d'annexes
- Matilda's Stepchildren
- Mating Fever
- Mating Through Time Defense Troopers 3
- Matrix Crystal Christmas
- Matrix Crystal Rebels
- Matrix Crystal River
- Matrix Man
- Matryoshka Infinities
- Matt Forbeck's Brave New World: Resolution
- Matt Forbeck's Brave New World: Revelation
- Matt Forbeck's Brave New World: Revolution
- Matter
- Mattox
- Maug- A Dane Maddock Adventure
- Maul
- Mauvaises ondes
- Maverick
- MAVERICK: Octant Chronicles #8
- Mavi Kan
- Max Nebulous
- Max Stone and the Lost Star of Zirdon
- Max the Mouse and the Secret of Mars
- Max, Agent X and the Galactic Conference
- Maxim
- Maxim Gunn: Down Under
- Maximum Ice
- Maximum Light
- Maxwell's Demons
- Mayan Sunset 2012
- Maybe This Time
- Mayday: A Kaiju Thriller
- Mayenne
- Mayflower II Colonists from Earth
- Mayflower II Colonists from Earth, Volume II
- Mayhem
- Mayhem in the Air
- Mayweed
- Maza of the Moon
- Maze (A Maze Short Story)
- Maze Runner. Il codice
- Mazes of Scorpio [Dray Prescot #27]
- Maître du monde
- Maître du monde – suivi d'annexes
- Maître Zacharius – suivi d'annexes
- MC 52
- McCade's Bounty
- McEdifice Returns
- McGellen
- McGonigal's Worm
- McGonigal’s Worm
- McIlvaines Star
- McIlvaine’s Star
- McLaughlin
- Me and Susannah
- Me Revoilà !
- Me, Myself and I (Dark Reflections Series Book 1)
- Me, Myself, & Feynman
- Me--Smith
- ME: A Novel of Self-Discovery
- Mean Universe
- Meant For The Cyborg Captain
- Meant to Be Together
- Meanwhile in the Middle of Eternity
- Meanwhile In Time
- Measure for a Loner
- Measure of a Man
- Meat Suit
- MECH
- Mech Apocalypse: A Military Science Fiction Thriller
- Mech Girl
- Mech War For Humanity: The Galahad Initiative
- Mecha Corps
- Mecha Origin
- Mecha Samurai Empire
- MechWarrior 5 Mercenaries: A Skein of Schemes (An Origins Series Story, #7)
- MechWarrior 5 Mercenaries: Contested Dreams (An Origins Series Story, #4)
- MechWarrior 5 Mercenaries: Dissimulate Wanderer (An Origins Series Story, #5)
- MechWarrior 5 Mercenaries: Endless War (An Origins Series Story, #3)