Berkley (#F1022; 1st printing) December 1964 paperback. Cover by Richard Powers, 144 pages, 50 cent cover price. Condition is Fine(-): tight and very square with flat spine; age tanning is mild and uniform (darker on insides of covers.) No stamps, marks or writing - this looks new / unread / edges still have some crispness. The only traces of wear are very slight bump-traces at lower left of front and back covers.

Invaders of Space, a novel by Murray Leinster. This is the first appearance / first edition.

SPACE QUEST
Things were quiet that night at the space port. Then the Theban arrived without warning. bringing with it a surly crew, led by a blustering captain, Larson...
The Theban was old, propelled by a totally obsolescent interplanetary drive. The only way Larson could get it off the ground was to kidnap the young engineer, Horn, who he hoped could at least manage to keep the ship in flight until it reached its final rendezvous.
Their destination was the spaceship Danae - a ship loaded with millions in space credit notes. If Horn wanted to save the Danae from the onslaughts of the space invaders, he had his work cut out for him.