Subtitled "Sixteen Tales of Science Fiction".

Edited by Harry Harrison.

"Sunjammer" by Arthur C.Clarke

"We Didn't Do Anything Wrong, Hardly" by R.Kuydendall

"Who Can Replace a Man?" by Brian W.Aldiss

"Tricky Tonnage" by Malcolm Jameson

"Appointment on Prila" by Bob Shaw

"Hi Diddle Diddle" by Robert Silverberg

"If" by Harry Harrison

"A Pail of Air" by Fritz Leiber

"The Howling Bounders" by Jack Vance

"Mirror of Ice" by G.Wright

"Heavyplanet" by M.A.Rothman

"Keyhole" by Murray Leinster

"The Wall Around the World" by Theodore R.Gogswell

"Prone" by Mack Reynolds

"Escape the Morning" by Poul Anderson

"Someday" by Isaac Asimov

New York: Doubleday, 1969, 287pp., hbk. Jacket: Vladimir F. Hervert.