- December
- Deception
- Deception Crossing
- Deception with a Twist
- Decide
- Decima squadra
- Decimation Island
- Decipher
- Decision at Doona
- Decisions
- Deck the Cogs
- Decker's War: Books 1-3
- Deckhand
- Decline
- Decode
- Decoherence
- Decomposing Angel
- Deconstruction - A History Department Misadventure
- Deconstruction: Prologue to Relics of Dawn
- Decoy
- DEEDS AND GREED
- Deeds, Daggers, and Diplomacy
- Deep
- Deep Black
- Deep Bounty
- Deep Breath Hold Tight
- Deep Claim
- Deep Descent
- Deep Dive
- Deep Echoes
- Deep Future
- Deep Hell
- Deep Mind
- Deep Mining: Golden West Trilogy Book 2
- Deep Sky
- Deep Space
- Deep Space Dragnet
- Deep Space Intelligence : Bad Man
- Deep Space Intelligence : Home
- Deep Space Intelligence : Invisible
- Deep Space Intelligence : Masters Return
- Deep Space Intelligence: Ghosts of Nyzon 5
- Deep Space Interface
- Deep Star and Hidden Terror
- Deep State
- Deeper
- Deeply Disturbed Donuts
- Deer Haven
- DEF: Wrath of the Gods - Revelations
- DEF: Wrath of the Gods - The Journey to the Black Mountains
- Defeat The Aliens
- Defeating the Storm
- Defect
- Defekt
- Defender of Genes
- Defender of the Departed
- Defenders of the Rim: Beginnings
- Defending Freedom
- Defending Her Vikings
- Defending Hope
- Defending the Galaxy
- Defiance (Stories of Singularity 6)
- Defiant Hearts
- Defining Criminality: A Drake Science Fiction Private Eye Short Story
- Defrost
- Defy or Defend: A Delightfully Deadly Novel
- Defying Mars
- Degenerated
- Degrees of Freedom
- Degrees of Separation
- Degrees of Freedom
- Degrees of Separation
- Dehors, les hommes tombent
- Deity
- Deity Six
- Deja Vu Halloo
- Dekker's Dozen: A Waxing Arbolean Moon
- Del amor y otras confusiones (Flash Relatos)
- Del nome dei numeri e della riparazione del cielo
- Deletion
- Delicious Zeal
- Deliverance
- Delivering Hope
- Delphi Collected Works of George Griffith (Illustrated)
- Delphi Promised
- DELPHIN HOMECOMING
- Delta-v
- Delusions of the Dead
- Deluxe Steamy Alien Romance Collection
- Dem Captain ausgeliefert
- Dem Dry Bones
- Demain dès l'aube - T1
- Demain est déjà hier
- Dementional
- Demeter
- Demigod
- Demise Of The Awakened Roshanian
- Demise of the Living
- Democracy's Might
- Democracy's Right
- Demogorgon Rising
- Demon
- Demon and Emily
- Demon Fallout: The Return