- Architects of Infinity
- Architects of Memory
- ARCHNEMESIS
- Archon Than: Episode 1
- Arco iris de mi alma
- Arcot e la Regina
- Arcturus Times Three
- Ardent Rising
- Are we Freaks of Nature?
- Are We Monsters
- AREA 51 (Alien Brut 4)
- Area 52
- Aremac Power: Inventions at Risk
- Arena
- Arena 2 (Book #2 of the Survival Trilogy)
- Arena Dos (Libro #2 de la Trilogía de Supervivencia)
- Arena İki (Köle Tüccarlari Üçlemesinin 2. Kitabi)
- Arena of Antares [Dray Prescot #7]
- Arena of Souls- A Brock Stone Adventure
- Arena Uno: Tratantes de Esclavos
- Ares Express
- Ares Zone-A
- Ares' Anger
- ARGEL: Book Four - Warrior Women
- ARGEL: Book One - Planet of Refuge
- Argel: Book Two - The Ssh'fah War
- Argo
- Argonautica
- Argosy All-Story Weekly Super Pack
- Argosy Volume 1: Fantastic Frontiers
- ARIA Science Fiction & Fantasy Firsts Boxed Set Vol. 1
- Arian
- Arianrhod
- Arianrhod's War
- Aries 181
- Ariki
- Ark
- Ark: Asteroid Impact
- Ark: Diaspora
- Ark: Post-Asteroid Eden
- Arkad's World
- Arkadian Skies
- ARKTIKA.1 (Short Story)
- Arlchip Burnout
- Arlo
- Armada of Antares [Dray Prescot #11]
- Armadeggon, 1970
- Armadillo
- Armageddon - 2419 A.D.
- Armageddon 2419 A.D
- Armageddon 2419 A.D.
- Armageddon 2419 A.D. (Illustrated and Annotated)
- Armageddon Arising
- Armageddon Cometh, Species Intervention #6609 Book Three
- Armageddon's Arrow
- Armageddon--2419 A.D. and The Airlords of Han
- Armageddons
- Armed Reconnaissance
- Armilus: It was the best of times. It was the End of Times.
- Armistice
- Armored Souls: the Complete Collection
- Army of Me
- Army Of One's Offensive
- Army of Souls (Scat's Universe Book 2)
- Arnica
- Around Midnight
- Around the World in 80 Days
- Around the World In Eighty Days
- Around the World in 80 Days
- Around the World In Eighty Days
- Around the World in Eighty Days
- Around The World in Eighty Days
- Around the World in Eighty Days
- Array 2781
- Arrested in Peace
- Arrival
- Arrival (Stories of Your Life MTI)
- Arrival (The Invasion Chronicles—Book Two): A Science Fiction Thriller
- Arrival: Octant Chronicles #0 Prequel
- Arrivo a Trainville
- Arrivée (Les Chroniques de l'Invasion, Tome Deux)
- Arrow Vingança
- Arsenio Lupin e il Circolo dell'Arca
- Artan's Night
- Arte
- Arteess: Conflict
- Artemis SSI
- Artemis: A Gamma Nine Short Story
- Arthurian Time Crisis: Part I - Magician
- Articulated Restraint
- Artie
- Artifact: A Planetfall Expeditionary Force Adventure (Book 1)
- Artificial Condition
- Artificial Evolution
- Artificial Insurrection
- Artificial Intelligence
- Artificial Squared
- Arunda
- Aryadians
- As Above, So Below
- As crônicas da Unifenda