4 • Final Blackout • [Editorial (Analog)] • essay by John W. Campbell, Jr. [as by John W. Campbell ]8 • The Lion Game (Part 1 of 2) • [Telzey Amberdon • 2] • serial by James H. Schmitz49 • In Times to Come (Analog, August 1971) • [In Times to Come (Analog)] • essay by The Editor51 • Letter from an Unknown Genius • shortstory by Colin Kapp68 • The Imbrium Impact • [Science Fact (Analog)] • essay by Nils Aall Barricelli77 • Topological Electronics • [Science Fact (Analog)] • essay by G. Harry Stine80 • Analog • novelette by Grant Callin [as by Grant D. Callin ]106 • A Little Knowledge • [Technic History] • novelette by Poul Anderson126 • Dummyblind • novelette by Douglas Fulthorpe147 • Department of Diverse Data (Analog, August 1971) • [Department of Diverse Data (Analog)] • essay by uncredited149 • Ratman • [LaNague Federation] • shortstory by F. Paul Wilson164 • The Analytical Laboratory: May 1971 (Analog, August 1971) • [The Analytical Laboratory] • essay by uncredited165 • The Reference Library: The Nebula Awards (Analog, August 1971) • [The Reference Library] • essay by P. Schuyler Miller169 • Brass Tacks (Analog, August 1971) • [Brass Tacks] • essay by uncredited
