Fredric Brown
The first issue featured Theodore Sturgeon, Damon Knight, Frank M. Robinson, and Richard Matheson. Other writers who appeared in the magazine included Jerome Bixby, John Wyndham, James E. Gunn, Fredric Brown, Frederik Pohl (both under his own name and with Lester del Rey under the joint pseudonym "Charles Satterfield"), Philip José Farmer, Randall Garrett, Zenna Henderson, and Algis Budrys.