- Little Agnes and the Shopkeeper Sham
- Little Alien Enslaved
- Little Alien on the Prairie
- Little Brother & Homeland
- Little Brother - Homeland
- Little Brother – Aufstand
- Little Brother – Sabotage
- Little Green Men #1 - Better Homes and Aliens
- Little Heroes
- Little Monsters
- Little People, Big Crimes
- Little Raven
- Little Sisters of the Apocalypse
- Little Talks
- Little Tours of Hell
- Littlestar
- Live Echoes
- Live Forever
- Live Free or Die
- Lives of the Monster Dogs
- Lives Of The Unknown Book 1: 2nd Edition
- Livet på den hule jord
- Livid Skies
- Living City
- Living Dead Town
- Living in a Nightmare
- Living in Adztronnox: The Fatherland
- Living in the Golden Age
- Living Metal
- Living Next Door to the God of Love
- Living on the Edge Ii
- LIving Things
- Living Things
- Living with the Dead
- Lizer Biggs
- Llana of Gathol
- Llegada (Las crónicas de la invasión—Libro dos)
- La Llorona: A Space Tragedy
- Llueven piedras sobre el valle del Alquim
- Lo scudo di Anghor
- Lo sfasciacarrozze
- Lo stabilimento
- Lo stallo dell'impero
- Lo Sterminatore Cremisi
- Lobo: Stargazer Alien Mail Order Brides #7 (Intergalactic Dating Agency)
- Lobos de Sangre
- Local Custom
- Local Star
- Lock of Silver
- Lock-In
- Lockdown Sci-Fi #1
- Lockdown Sci-Fi #2
- Lockdown SCI-FI #3
- Lockdown: Star Wars Legends (Maul)
- Locked Tight
- Locked-Down Heart
- Lockruf der Unendlichkeit
- Lockruf der Unendlichkeit Bd.2
- La locomotive à vapeur céleste
- Locus Solus
- Lodestone Book Four: Seeds across the Sky
- Lodestone Book Six: Eternity's Shadow
- Lofty Dreams of Earthbound Men
- Logan Ryvenbark's Saga Box Set
- Logan's Journal: Companion to the 'Bloodlines Triology'
- Logic
- Logomachy
- Logos Run
- Loki's Exile Series: Bundle: Books 1 - 4
- Lola Flannigan
- London Lark
- London Lost
- Lone Huntress
- Lone Journeyman Book 1: Alligator Dances
- Lone Journeyman Book 2: Storm Clouds
- Lone Journeyman Book 3: New Lands
- Lone Star Planet
- Lone Star Planet & Four Day Planet
- Lonely Hearts on Mars
- Lonely Shore
- Loner's Deep
- Long Arm of the Law
- Long Dark Dusk
- Long Live The Emperor
- Long Lost
- Long Past Time
- Long Shot: A Remnant of the Commonwealth, Book One
- Long Story Short (short story collection)
- Long Shot: A Remnant of the Commonwealth, Book One
- Long Story Short (short story collection)
- Long Tunnel
- Long Way Home
- Longer
- Longhorn
- Longknifes Defend the Legation
- Longknives Defend the Legation
- Longshot
- Longshot Hypothesis
- La Longue Nuit, Tome 1
- Look Down
- Look What's Happened to Mad Science U
- Looker
- Looking at Trouble
- Looking Backward
- Looking Backward & Equality
- Looking Backward 2000-1887
- Looking Backward From the Year 2000
- Looking Backward, 2000-1887
- Looking Backward, 2000–1887
- Looking Backward. Roman
- Looking Backward: 2000 to 1887
- Looking Backward: 2000-1887
- Looking Backward: Dystopian Classic
- Looking For Love In A Bar Called Eternity
- Looking Further Backward
- Looking Further Forward / An Answer to Looking Backward by Edward Bellamy
- Looking Through Lace
- Looking Through Lace Boxed Set
- Loop
- Loose Cannon
- Loot of the Void
- Lord der Sterne
- Lord Dunsany Super Pack
- Lord Jim
- Lord of a Thousand Sun: Space Stories of Poul Anderson (Illustrated)
- Lord of a Thousand Suns
- Lord of Blood
- Lord of Janissaries
- Lord of the City
- Lord of the Underworld: A Ransom & Fortune Adventure
- Lord of the World