The marvelous animal characters and cliff-hanging chapter endings of her father's notable novel MRS. FRISBY AND THE RATS OF NIMH are employed by the author of this fantasy adventure involving a rat community living by its own moral, ethical rules. The rats employ violent means to achieve preservation in the face of human alterations to their habitat. An enjoyable and discussible story stands on its own as well as being a sequel to its famous predecessor. (Ages 7-12)