from wikipedia article
BY suzanne collins
THE PROPHECY OF GRAY
"Beware, Underlanders, time hangs by a thread.
The hunters are hunted, white water runs red.
The gnawers are sent to extinguish the rest.
The hope of the hopeless resides in a quest.
An Overlander Warrior, a son of the sun,
May bring us back light, he may bring us back none.
But gather your neighbors and follow his call
or rats will most surely devour us all.
Two over, two under, of royal descent,
Two fliers, two crawlers, two spinners assent.
One gnawer beside and one lost up ahead.
And eight will be left when we count up the dead.
The last who will die must decide where he stands.
The fate of the eight is contained in his hands.
So bid him take care, bid him look where he leaps,
As life may be death, and death life again reaps."
Gregor goes on an epic journey to get hold the Underland's human inhabitants and their world as they know it