Contents:
Introduction (13 Above the Night) • (1965) • essay by Groff Conklin
Founding Father • (1962) • novelette by J. F. Bone
Mating Call • (1961) • shortstory by Frank Herbert
Nice Girl with Five Husbands • (1951) • shortstory by Fritz Leiber
Prone • (1954) • shortstory by Mack Reynolds
The Education of Tigress McCardle • (1957) • shortstory by C. M. Kornbluth (aka The Education of Tigress Macardle)
Now Inhale • (1959) • novelette by Eric Frank Russell
The Back of Our Heads • (1958) • novelette by Stephen Barr
Button, Button • (1953) • shortstory by Isaac Asimov
The Deep Down Dragon • (1961) • shortstory by Judith Merril
The Kappa Nu Nexus • (1961) • shortstory by Avram Davidson and Morton Klass
Idiot Solvant • (1962) • shortstory by Gordon R. Dickson
Counter Security • (1963) • novelette by James White
The Dreistein Case • (1958) • shortstory by J. Lincoln Paine