Galaxy Science Fiction: April 1967 Volume 25, Number 4
Illustrations by Gray Morrow, Jack Gaughan. Cover by Doug Chaffe (for "You Men of Violence")

Novelettes: "Thunderhead" by Keith Laumer
"The Purpose of Life" by Hayden Howard (end of The Eskimo Invasion.)

Stories: "Fair Test" by Robin Scott
"The New Member" by Christopher Anvil
"The Young Priests of Adytum 199" by James McKimmey
"Within the Cloud" by Piers Anthony
"Ballenger's People" by Kris Neville
"You Men of Violence" by Harry Harrison.

Science: "For Your Information: The Orbits of the Comets" by Willy Ley

Frederik Pohl's editorial is "Making Models." Judy-Lynn Benjamin is Associate Editor; Book Reviews by Algis Budrys.