Analog Science Fact & Fiction September 1961 (Volume 68, Number 1)
Illustrations by H. R. Van Dongen, Douglas, Ivie, John Schoenherr. Cover by H. R. Van Dongen.

Serial: "Sense of Obligation" (Part 1 of 3) by Harry Harrison (book title was Planet of the Damned.)

Novelettes: "The Blaze of Noon" by Randall Garrett & Avram Davidson
"Modus Vivendi" by Walter Bupp.

Stories: "They Also Serve" by Donald E. Westlake
"Fifty Per Cent Prophet" by Darrel T. Langart (Randall Garrett.)

Science: "Scientific Break-throughs" by H. C. Dudley, Ph.D.

John W. Campbell's editorial is "Science Fantasy"; Book reviews by P. Schuyler Miller.