MASTERS' CHOICE 2

Tandem paperback, 1969. Cover artist uncredited.

Rear cover fluff: 

The best science fiction stories of all time - chosen by the masters of science fiction. Here are the masters who chose the stories: Poul Anderson, Isaac Asimov, Alfred Bester, James Blish, Robert Bloch, Fredric Brown, John W. Campbell, Arthur C. Clarke, Lester del Rey, Horace L. Gold, Damon Knight, Fritz Leiber, Murray Leinster, Judith Merril, Clifford D. Simak, E. E. Smith, Theodore Sturgeon, William Tenn, Jack Williamson, John Wyndham. 

The stories they chose: Seven-Day Terror by R. A Lafferty, Coming Attraction by Fritz Leiber, Politics by Murray Leinster, Memento Homo by Walter M. Miller, Jr., The Bright Illusion by C. L. Moore, And Now The News by Theodore Sturgeon, The Custodian by William Tenn and The New Accelerator by H. G. Wells.

INVADERS OF SPACE

Tandem SF paperback, 1968. Cover artist uncredited.

"Things were quiet that night in 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..."