Six episodes from the original series, converted from script form to novelettes by Blish.

CONTENTS, with original script author:
. The Alternative Factor [Don Ingalls]
. The Empath [Joyce Muskat]
. The Galileo Seven [Simon Wincelberg & Oliver Crawford]
. Is There In Truth No Beauty? [Jean Lisette Aroeste]
. A Private Little War [Don Ingalls & Gene Roddenberry]
. The Omega Glory [Gene Roddenberry]