The Trial of Terra - Jack Williamson - 1962 Ace Books Paperback

Condition: Acceptable. Please see the images for more details.

Cover art:

Blurb: “The men of Earth were on the verge of breaking into space. The first of their manned moon rockets was on its way to Luna. Now, after ten thousand years, the celestial Watchers were forced to a decision.

Were the Earth people ready to join in the civilizations of space—or should they be turned down and wiped out with solar fire?

THE TRIAL OF TERRA had begun!”