Mother Lode
Zach Hughes
The Mote in God's Eye
Larry Niven & Jerry Pournelle
Moties (1)
Mostly Harmless
Douglas Adams
Hitchhiker's Guide to the Galaxy (5)
More Than Human
Theodore Sturgeon
Moonwar
Ben Bova
Moonrise (2)
Moonrise
Moonrise (1)
Moon Fate
Laurence James
Deathlands (16)
Montezuma Strip
Alan Dean Foster
Monster of the Maze
Manning Lee Stokes
Richard Blade Adventures (6)
The Moment of Eclipse
Brian W. Aldiss
Moment of Eclipse
The Mission
Bob Mayer
Area 51 (3)
Mission to Moulokin
Icerigger Trilogy (2)
The Misplaced Battleship
Harry Harrison
The Stainless Steel Rat (1)
Mirror Friend, Mirror Foe
Robert Asprin & George Takei
Mirkheim
Poul Anderson
Nicholas Van Rijn (6)
A Miracle of Rare Design
Mike Resnick
Birthright Universe (1)
Midworld
Humanx Commonwealth (3)