that he has no memories that could threaten their security, and accept the captain's testimony that he is harmless. They decide it is no longer viable to preserve the myth about human vulnerability to FTL travel and allow him to return home, where he will stand trial by human authorities for violating the treaty between the two races. On the way, Steele ponders the significance of the "eighth color". The distinctive color of the fuel was not common knowledge because it was outside the normal visible spectrum, and the Lhari had no color vision. The population of the planet where Steele's mother was born had evolved a little-known additional color sense that allowed them to see the fuel's color under very bright light. Steele remembers seeing that same color while visiting an uninhabited planet on his initial voyage, and realises that he now knows the location of a source of fuel within our own galaxy. Steele publicises his findings, making it clear that the human race will soon be able to reach the stars without help. The Lhari authorities, seeing their monopoly ending, take an optimistic view that the new developments will ultimately be good for both races, and Steele is invited to re-join the Lhari crew in preparation for training future human crews. Reviews Envoyer (German) (Issue 27 - Jan 1999) References External links The Colors of Space at Project Gutenberg 1963 science fiction novels 1963 American novels Novels by Marion Zimmer Bradley American science fiction novels