When Ben Bova sold his original original science fiction anthology The Many Worlds of Science Fiction in 1969, he invited Robert Silverberg to contribute to it. Silverberg penned "Something Wild Is Loose" in the final weeks of 1969, just after completing his psychedelic SF novel Son of Man.
An Enemy of Peace
Robert Silverberg
bookBlack Cat Weekly #120
Janice Law, Eve Fisher, Joseph Walker S., Hal Charles, Robert Silverberg, Ron Goulart, Alan J. Wahnefried, Evelyn E. Smith, Sir Arthur Quiller-Couch
bookBlack Cat Weekly #105
Steve Liskow, Stephen D. Rogers, Adrian Cole, Hal Charles, Robert Silverberg, Joseph Payne Brennan, Frank Belknap Long, Lin Carter, John Gregory Betancourt, Henry T. Parry
bookBlack Cat Weekly #80
Phyllis Ann Karr, Hugh Lessig, Jim Thomsen, Robert Silverberg, Hal Charles, Robert F. Young, Murray Leinster, Nicholas Carter
bookOther Covenants
Harry Turtledove, Robert Silverberg, Lavie Tidhar, Esther Alter, Gwynne Garfinkle, Elana Gomel, Rivqa Rafael, Jack Dann
bookThe Hot Beat
Robert Silverberg
bookLair of the Dragonbird
Robert Silverberg
bookGorgon Planet
Robert Silverberg
bookBlack Cat Weekly #43
Victoria Weisfeld, John Varley, Daniel Marcus, Robert Lopresti, Isaac Asimov, George O. Smith, Murray Leinster, Robert Silverberg, Edwin Balmer, Nicholas Carter
bookBlack Cat Weekly #2
Leslie Ford, David Brin, Jeff Cohen, Frank Lovell Nelson, Hal Charles, Hugh Walpole, Reginald Bretnor, Robert F. Young, Randall Garrett, Robert Silverberg
bookThe Alien Dies at Dawn
Robert Silverberg, Randall Garrett
bookSomething Wild Is Loose
Robert Silverberg
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