- MADe
- Made in Tanganyika
- Made-to-Order
- Mademoiselle de Scuderi and Other Tales
- Madness
- Madness from the Inconstant Moon
- Madness Town
- Madness Under the Tracks
- Madre di sangue
- Maelstrom of Treason
- Maelstrom: A Diving Universe Novella
- Maeve
- Mage Against the Machine
- Magellan
- Mages Glory
- Immortal Realms
- Magic & Mayhem Sampler
- Magic Among Us
- Magic and Machines
- Magic in "The City": A San Francisco Story
- Magic's Little Helper
- Magic, New Mexico Boxset Books 1-3
- Magical Meanderings
- Magicka Apocalyptica
- Magier Rapport
- Magier! Drei Fantasy-Sagas um Schwert und Magie
- Magma am Himmel
- Magnet Omnibus I
- Magnet: Marauder (Lacuna)
- Magnet: Scarecrow
- Magnet: Special Mission (Lacuna)
- Magnetic Miss Meteor
- Magnetism: Cryoborn Gifts
- Magnificat
- Magnificent Devices
- Magnificent Devices Manor House Quartet
- Magnitude
- Mago
- MagTech Suit Up
- Magus- A Dane Maddock Adventure
- Mai Più
- Maid of Thuro
- Maiden Voyage of the Pink Plastic Ponies
- Mail Order Massacres
- Maiwa's Revenge
- Majipoor Chronicles
- Major Science Fiction Anthologies: A Brief History
- Make It So: Leadership Lessons from Star Trek: The Next Generation
- Make No Martyrs: Book 1 of the Eichi Testaments
- Make Shift
- Make Us Happy
- Maker
- Maker Space
- Making Mars Volume 1
- Making Sense of Jacob Klaus
- Mako's Bounty
- Maladapt
- Malaz
- Malcolm Jameson: Science Fiction Collection - 17 Books in One Edition
- Maldición (Libro 1 de la Trilogía Wexkia)
- Malfunction
- Malfunction: The Awakening of Mila
- Maliseche: el renacer
- Malleus Terrarium. Хроника первая: Каллум
- Malmotta - Das Unbekannte (Science-Fiction-Roman)
- Malu, a Novel
- Malédiction
- Mamelukes
- Mammalia
- Mammoth Book of Best New SF 28
- Mammuthus
- Man
- Man Against the Future
- Man and Machine
- Man from Atlantis
- Man from the Moon
- Man in a Cage
- Man met een missie
- Man of Earth
- Man Over Mind
- Man Plus
- Man's Best Friend
- Man's Rights
- Man-Kzin Wars III
- Man-Kzin Wars IV
- Man-Kzin Wars Series V
- Man-Kzin Wars XIV
- Man-Kzin Wars XV
- Mana Pool
- Manalive
- Manape the Mighty
- Mandated Happiness
- Mandato di cattura
- Mandeler's Crystal
- Manhattan 2058
- Manhattan 2059 - Eternity
- Manhattan Transfer
- Manhounds of Antares [Dray Prescot #6]
- Manhunt How Long Can You Run
- Maniac in Blue (M.I.B.)
- Maniacs: The Krittika Conflict
- Maniai Case File 1: The Girl And The Blood Slide
- Manic Musings of a Maniacal Mind
- Manifest Destiny: A Story of the Future
- Manifest Gluttony
- Manifold: Origin
- Manifold: Space
- Manifold: Time
- Manjac And The Nosebleed Section
- Mankind in the Making
- Manna from Heaven
- Manoscritto trovato in una macchina del tempo abbandonata
- Manseed
- Manta's Gift
- Mantasi
- Mantis
- Manuale di Metafisica elementare
- Manumission
- Many Little Deaths
- Manykomica