Star paperback, 1982. Cover painting by Attila Hejja. "They were in deep space, past the point of no return, when the saboteur s...

Mayflower-Dell paperback, 1963. Cover artist uncredited. "That the Nipe had embarked on its incredible career of robbery and mur...

Lancer paperback, 1969. Artwork by Bill Skurski "Aliens aren't Human!   No matter what the shape of an alien body or how gre...