Synopsis by Sandra Brennan
In this youth-oriented sci-fi adventure, a war-faring race known as the Triad travel the galaxy destroying planets in their quest to conquer the universe, and now they have set their sights upon Earth. The imperiled blue planet's only hope for survival rests upon the callow shoulders of three Academy of Galactic Exploration cadets and a princess from the planet Pyrus, which was blown apart by the Triad. Lacking the massive weapons of their foes, the heroes must rely upon their cleverness and the element of surprise if they are to warn the Earth in time.
cadet, good-vs-evil, princess, world-destruction