Tight, flat, square book. Library bound, issued without jacket, with the wraparound painting of the original release silksreened to the cover. Glue stain typical to the glue used in this era. Ex-library, properly de-accessioned with all expected stamps, labels, marks, paste downs and protections. 

Contents:
Introduction • (1965) • essay by Groff Conklin
Microcosmic God • (1941) • novelette by Theodore Sturgeon
Commencement Night • (1953) • novelette by Richard Ashby
The Deep Range • (1955) • shortstory by Arthur C. Clarke
Machine Made • (1951) • shortstory by J. T. McIntosh
Trip One • (1949) • shortstory by Edward Grendon
Venus Is a Man's World • (1951) • novelette by William Tenn
Good-Bye, Ilha! • (1952) • shortstory by Laurence Manning
Misbegotten Missionary • (1950) • shortstory by Isaac Asimov (aka Green Patches)
The Ethical Equations • (1945) • shortstory by Murray Leinster
Misfit • (1939) • novelette by Robert A. Heinlein
Genius • (1948) • novelette by Poul Anderson
Basic Right • (1958) • novelette by Eric Frank Russell