This book is part of a book series called Rats Of Nimh .

There are 260 pages in this book. This book was published 1991 by HarperCollins Publishers Inc .

Jane Leslie Conly is a best-selling author whose works include the critically acclaimed "Trout Summer "(an ALA Notable and Best Book for Young Adults), and W"hile No One Was Watching. " She is also the author of the Newbery Honor book, "Crazy Lady!," as well as "Racso and the Rats of NIMH," which is a sequel to "Mrs. Frisby and the Rats of NIMH," the Newbery Medal-winner written by her father, Robert C. O'Brien.