- G581: Earth
- G581: The Departure
- Gabekarnian
- Gabriella
- Galactic Ancestors
- Galactic North
- Galaxienwanderer - Herrscher über Galaxien
- Galaxienwanderer Zyklus Sammelband 4 Romane
- Gamin Technology
- Garro: Collection
- Garro: End Times
- Gawain
- Gedankendimensionen - Bände 0-4
- Gen Crash
- Generations Unbound
- Genesis
- Genesis Sequence
- Georgia On My Mind and Other Places
- GESTALT
- Gettysburg Revisited
- Ghost Country
- Ghost in the Machine
- Ghost in the Machine
- Ghost Spin
- Ghosts of Atlantis
- Ghosts of the Secret Desert
- Ghosts on the StarSmasher
- Giant Dreams and Dragons
- Giants on the Earth
- Gibbon's Decline and Fall
- Gift From The Stars
- Giorni verdi nel Brunei
- Girl from Above (Books 1 & 2)
- Girl Genes: A Scifi Gender Swap Romance Story
- Give the Hippo What He Wants
- Give the Robot the Impossible Job!
- Giù nei territori
- Glasshouse
- Gli Anziani
- Gli Illuminati
- Glorious
- Goddess of War
- Goddesses & Other Stories
- Going Dark
- Going Native
- Gold Rush Mystery
- Golden Fleece
- Golden Gate Volcano
- Goliath
- Goliath: The Graphic Novel
- Golème
- Gran Rojo
- Grand Theft Starship
- Grandfather Anonymous
- Grandfather Ghost
- Gravewalkers: Thunderhead
- Gravity of a Distant Sun
- Gravity Waves
- Green Lady
- Green Mars
- Grillbar Galaktyka
- Großband #9 - Chronik der Sternenkrieger: Wo die Erhabenen wohnen: Acht Sternenkrieger Romane
- Großband 5 – Chronik der Sternenkrieger: Sieben Sternenkrieger-Romane
- Guardian Angels and Other Monsters