The Mask of Time - U6121
Robert Silverberg-
Elder Realms: A LitRPG Adventure
David J. Vanbergen Jr. & K. L. Reinhart
Path of Celestial Ascension (3)
Power Systems
Noam Chomsky
American Empire Project (1)
Ruined by a Rake
Erin Knightley
All's Fair in Love (1)
Roter Mars
Kim Stanley Robinson
Mars Trilogy (1)
Rocket Ship Galileo
Robert A. Heinlein
The Rock Rats
Ben Bova
The Grand Tour: Asteroid Wars (2)
Rocannon's World
Ursula K. Le Guin
Hainish Cycle (1)
The Robot Novels: The Caves of Steel / The Naked Sun / The Robots ...
Isaac Asimov
Robot (1)
The Robert E. Howard Omnibus: 99 Collected Stories
Robert E. Howard
The Road to Amber
Roger Zelazny
The Collected Stories of Roger Zelazny (6)
Riverworld: To Your Scattered Bodies Go/The Fabulous Riverboat
Philip José Farmer
Riverworld (1)
Riverworld: Including To Your Scattered Bodies Go & The Fabulous ...
Riverworld (5)
Riverworld and Other Stories
The River of Time by David Brin
David Brin
River of Blue Fire
Tad Williams
Otherland (2)
Rite of Passage
Alexei Panshin
Rising
Sally Malcolm
Stargate Atlantis (1)
Rings of Ice
Piers Anthony
The Ring of Five Dragons
Eric Van Lustbader
Pearl Saga (1)
Ring
Stephen Baxter
Xeelee Sequence (4)
Rimrunners
C.J. Cherryh
Rift in the Sky
Julie E. Czerneda
The Clan Chronicles (3)
Riders of the Storm
The Clan Chronicles (2)
Riders of the Purple Wage
Revolt in 2100
Future History (1)
Return to the Whorl
Gene Wolfe
The Book of the Short Sun (3)
Return to Mars
The Grand Tour: Mars (2)
Return to Eden
Harry Harrison
West of Eden (3)
The Return of Santiago: A Myth of the Far Future
Mike Resnick
Return Engagement
Harry Turtledove
Settling Accounts (1)