Mrs. Frisby & the Rats of NIMH
 Written by: Robert C. O'Brien
 Illustrated by: Justin Todd, Zena Bernstein
 Published: New York, Atheneum, 1971.
        1/2/75, ATH 4/30/86, 6/10/94
 ISBN: 0140307257, 0140366148
+ Having no one to help her with her problems, a widowed mouse
visits the rats whose former imprisonment in a laboratory
made them wise and long lived.


Racso & the Rats of NIMH
 Written by: Jane Leslie Conly
 Illustrated by: Leonard Lubin
 Published: New York: Harper & Row: c1986
 ISBN: 0060213612, 0060213620
+ Timothy Frisby, a field mouse, teams up with the adventurous
  young rat Racso as together they try to prevent the
  destruction of a secret community of rats that can read and
  write.



R-T, Margaret, & the Rats of NIMH