Contents: 6 • In Times to Come (Astounding, February 1939) • [In Times to Come (Astounding)] • essay by The Editor 6 • The Analytical Laboratory: December 1938 (Astounding, February 1939) • [The Analytical Laboratory] • essay by The Editor 9 • The Crucible of Power • novelette by Jack Williamson 33 • Living Fossil • short story by L. Sprague de Camp 44 • Blizzard on Saturn • essay by John W. Campbell, Jr. [as by Arthur McCann] 45 • Cosmic Engineers (Part 1 of 3) • serial by Clifford D. Simak 72 • Unknown • [Editorial (Astounding)] • essay by John W. Campbell, Jr. 73 • Palooka from Jupiter • short story by Nat Schachner 86 • Ice Age Ahead? • essay by Willy Ley 96 • "Ah, But You're Wrong!" • essay by John W. Campbell, Jr. [as by Arthur McCann] 97 • "Nothing Happens on the Moon" • short story by Paul Ernst 109 • "The Shadow of the Veil" • short story by Raymond Z. Gallun (variant of The Shadow of the Veil) 117 • Lorelei of Space • novelette by Frederic Arnold Kummer, Jr. 137 • Oil • short story by Don Wire 152 • Science Discussions and Brass Tacks (Astounding, February 1939) • [Brass Tacks] • essay by The Editor 152 • Letters.
John Wood Campbell, Jr. was an influential figure in American science fiction. As editor of Astounding Science Fiction (later called Analog Science Fiction and Fact), from late 1937 until his death, he is generally credited with shaping the so-called Golden Age of Science Fiction.
Isaac Asimov called Campbell "the most powerful force in science fiction ever, and for the first ten years of his editorship he dominated the field completely."
As a writer, Campbell published super-science space opera under his own name and moody, less pulpish stories as Don A. Stuart. He stopped writing fiction after he became editor of Astounding.